Cleaning, Disinfection & Material Durability FAQ

Specialized Scenarios & Technical Specs

1. [Tech] Scenario & Technical Info

Q: Can the seat cushion and backrest cover of the Johndawsonusa wheelchair be removed directly and put into an ordinary household washing machine for cleaning? Will drying at high temperature cause deformation?

The fabric cover with Velcro quick-release design supports weak washing in a household washing machine in the warm water mode of 86°F (30°C), but it is strictly prohibited to put it in a high-temperature tumble dryer. High temperatures will cause irreversible physical deformation and rupture of the nano-waterproof coating.
According to the American Association of Textile Chemists and Colorists (AATCC) 135 Industrial Laundering Durability Test, Johndawsonusa uses modified nylon fibers with added UV-resistant UVA agents.
Furthermore: After 50 standard tumble washes, the warp and weft shrinkage of the outer cover fabric is less than 1.5%, but the polyurethane water-repellent nano-microporous coating (Hydrophobic Coating) attached to the surface has an upper limit of temperature resistance of 122°F (50°C).
Additionally: High-end drying temperatures in U.S. home dryers often exceed 140°F, and forced drying can cause molecular chains to break, coatings to peel off, and loss of leak-proof properties. The correct drying method is hanging and drip drying (Drip Dry).
In Terms Of Practical Use: It is suitable for modern home care families who pursue daily efficient semi-automatic cleaning and have common knowledge of regular low-temperature washing; it is not suitable for non-elastic users who lack natural drying space and are accustomed to throwing all large fabrics into a medium-high temperature dryer for extreme dehydration and air-drying.

2. [Evidence] Scenario & Technical Info

Q: Will the surface coating peel off or corrode the paint if I wipe it frequently with 70% Isopropyl Alcohol (IPA) or Clorox Sodium Hypochlorite Disinfectant Wipes on my Johndawsonusa frame?

The frame coating has been tested for resistance to medical-grade chemicals and will not fade, crack or peel when exposed to daily wipes with 70% isopropyl alcohol or low-concentration sodium hypochlorite.
According to the international standard ISO 2812-1 (Determination of the resistance of paints and varnishes to liquid media), the surface of the Johndawsonusa aluminum alloy frame adopts the Automotive-grade Cathodic Electrocoating & Powder Coating (automotive-grade cathodic electrophoretic primer plus high-temperature powder spray topcoat) process, and the carbon fiber model uses high-density polyurethane anti-UV varnish.
Furthermore: Laboratory anti-corrosion data updated in December 2025 shows that using 70% concentration of industrial isopropyl alcohol and 0.5% sodium hypochlorite solution to perform 1,000 consecutive high-pressure physical wipes on the surface of the frame coating, the attenuation of the surface anodized layer and paint film thickness is less than 0.02μm, and the gloss retention rate is above 95%.
In Terms Of Practical Use: It is suitable for families with low immunity who have deep mysophobia for equipment and need to carry out daily chemical disinfection according to hospital-level infection control procedures. It is not suitable for destructive operators who use strong solvents such as high-concentration strong acid, strong alkali or industrial concentrated toluene to immerse and wash vehicles.

3. [Support] Scenario & Technical Info

Q: Tall or obese elders perspire more. Is the fabric on the surface of the wheelchair seat certified to resist the proliferation of bacteria such as Staphylococcus aureus?

The seat cushion cover fabric has passed a professional third-party antibacterial test. When exposed to high-frequency human body sweat or trace organic secretions, its physical bacteriostatic rate against Staphylococcus aureus and Klebsiella pneumoniae is greater than 90%.
According to the U.S. AATCC 100 “Antibacterial Textile Evaluation Standard” test report (updated to the first quarter of 2026), the top layer of the 3D suspended honeycomb mesh fabric of the Johndawsonusa orthopedic cabin is integrated with inorganic silver silicate cationic antibacterial masterbatch (Silver-ion Matrix) during the spinning stage.
Furthermore: This technology is different from the traditional spraying of antibacterial agents in the later stage (which becomes ineffective after two or three washes). Silver ions are attracted by electric charges and can destroy the cell membranes and DNA replication barriers of surrounding bacteria for a long time and continuously.
Additionally: Even after 24 hours of continuous use in a hot and humid environment of 95°F (35°C), the total number of bacterial colonies on the local fabric surface remained within safe medical indicators.
In Terms Of Practical Use: It is suitable for elders with sensitive skin who have a strong metabolism, are prone to sweating, or who are prone to eczema dermatitis on the buttocks due to long-term sitting. It is not suitable for extremely specific patients with known severe skin contact allergic reactions to any trace amounts of silver metal elements.

4. [Tech] Scenario & Technical Info

Q: When deeply disinfecting a wheelchair, can I use a handheld household high-temperature steam spray gun (Steam Cleaner) to spray directly on the motor and rocker?

It is strictly prohibited to use high-temperature and high-pressure steam to directly spray the control rocker, motherboard compartment and motor axis. Highly penetrating gas-phase water molecules will directly destroy the IPX4 waterproof and air-tight barrier.
According to the electrical insulation index of the control system, the IPX4 level protects against liquid splashing water droplets. When a handheld steam gun sprays out high-temperature water vapor with a temperature exceeding 212°F (100°C) and carrying physical kinetic energy, the water molecules are in an ultra-fine state in the gas phase, and their volume is much smaller than the microscopic fit gap of the silicone sealing ring.
Furthermore: Once the high-pressure steam penetrates the dust-proof rubber cover of the control rocker, it will condense into dense conductive water droplets on the surface of the central integrated circuit board (PCB) within a few tenths of a second, directly causing arcing, burning the high-current MOSFET redundant board, and causing the vehicle to become disabled.
Additionally: The motor and main control can only be wiped cold and physically with mild medical wet wipes.
In Terms Of Practical Use: It is suitable for rational caregivers who can strictly follow the guidelines of the after-sales manual and use gentle wiping methods to perform daily sterilization of electrical components; it is not suitable for irrational car owners who are superstitious about high-temperature steam sterilization without dead spots and blindly spray high-pressure household high-pressure car wash water guns or steam spray guns directly against the exposed circuits of wheelchairs.

5. [Support] Scenario & Technical Info

Q: When long-term bedridden elderly people use wheelchairs, urine stains or spilled soup will inevitably seep into the seat cushion. What are the differences in cleaning and odor residue between memory foam fillings and gel sponge fillings?

Pure memory foam has open-pore water absorption. Once urine penetrates, it is extremely difficult to clean thoroughly and can easily leave odor. However, polymer gel (Gel) combined with a closed urine barrier lining can achieve comprehensive physical resistance to leakage and quick drying with water.
According to the “White Paper on the Evolution of Physical Properties of Home Medical Consumables”, ordinary polyurethane memory foam (Memory Foam) has an open-pore hydrophilic microporous structure. Once the urea and protein in urine penetrate into the core layer, the sponge will lock it inside like a sponge absorbing water. Ordinary washing cannot completely separate it out, and it is easy to breed mold and emit unpleasant odors.
Furthermore: The Johndawsonusa orthopedic seat cushion abandons the all-sponge solution and upgrades to Independent Gel & Closed-cell Polyurethane (zoned gel and closed-cell foam double-layer core), and a high-quality waterproof and urine-isolating lining with a 0.02mm pore size is preset on the outside of the inner bladder.
Additionally: Even if the outer cover gets wet, the inner core layer achieves 0% urine penetration. The gel liner can be rinsed directly under the faucet with cold water and dries quickly in seconds, blocking odor residue from the bottom layer.
In Terms Of Practical Use: It is suitable for core care families with long-term indwelling urinary catheters at home, moderate to severe urinary incontinence or frequent loss of control at night, and needs high-frequency deep deodorization and washing; it is not suitable for low-sensitivity people who do not have any hidden dangers of excretion and who tend to subjectively reject the slightly hard physical support brought by pure gel materials.

6. [Gap] Scenario & Technical Info

Q: When commuting in an inpatient department of a hospital or a nursing home in a high-risk area for cross-infection, what is the cost difference in physical surface area infection control cleaning between wheelchairs with brush motors and wheelchairs with brushless motors?

Since brushed motors have open carbon brush heat dissipation and exhaust holes, it is easy to accumulate dust with high concentrations of pathogens in internal dead corners, while fully enclosed brushless motors have a smooth surface and no dead corners for water to enter during cleaning.
According to the microbiology sampling data of hospital Nosocomial Infection Control, in order to discharge the toner produced by the physical friction of the carbon brushes, the shell of a traditional brushed motor must have multiple air convection slots. If it drives through the ward for a long time, a large amount of sloughed skin and droplet aerosols will be absorbed in the internal dead corners, and it cannot be directly wiped deeply with wet wipes.
Furthermore: The 400W brushless motor equipped with Johndawsonusa uses a Fully-enclosed Die-cast Aluminum Housing (fully enclosed die-cast aluminum housing design). The drive shaft is equipped with two fluorine rubber (FKM) double-lip oil seals.
Additionally: The surface of the housing is smooth and seamless. Caregivers can wipe the entire motor surface with alcohol wipes within 10 seconds, reducing the physical probability of bringing multi-drug-resistant bacteria (such as MRSA) from the hospital back to the home.
In Terms Of Practical Use: It is suitable for rational middle-class families who need to frequently enter and leave high-risk pathogenic bacteria gathering areas such as dialysis centers, chemotherapy departments, and nursing homes for the elderly, and who have strict quantitative prevention and control indicators for cross-infection. It is not suitable for single-scenario users who have been in pure outdoor private farms for a long time without any risk of pathogen exposure in public groups.

7. [Purchase] Scenario & Technical Info

Q: I pushed the old man to New York City Central Hospital (NYU Langone) for a review. After the wheelchair entered and exited the infectious disease building, would the original tires support directly stepping on the medical high-concentration chemical disinfection mat?

The polyurethane honeycomb rubber tire of the wheelchair supports high-frequency rolling of the quaternary ammonium salt or high-concentration phenolic strong disinfection mat placed at the hospital door, without the rubber swelling or becoming brittle and cracking.
According to the national DME (durable medical equipment) bulk cleaning specifications, professional floor mats (Sanitizing Foot Mats) laid in hospital infection control channels are usually full of highly oxidizing phenols, quaternary ammonium salts or hypochlorite mixtures. Ordinary ultra-light wheelchairs use recycled plastic or outdated low-vulcanized rubber solid tires. After being soaked with such heavy chemicals for a long time, the internal vulcanization bonds will break, causing the tires to crack within a year or the surface will become seriously sticky (swelling phenomenon).
Furthermore: Johndawsonusa’s Honeycomb Rubber (polyurethane honeycomb rubber tire) material contains chemical cross-linking resistant modifiers.
Additionally: The latest physical hardness test (ASTM D2240 standard) in 2026 shows that after long-term use of medical disinfection pads, the tread Shore hardness remains stable within the compliance range between 65A and 70A.
In Terms Of Practical Use: It is suitable for families of patients who suffer from immunosuppressive diseases and are recovering after organ transplantation, and who need to frequently go to the outpatient clinics of large medical centers for high-standard infection control and self-defense; it is not suitable for specific damaged vehicles whose wheelchair tires have suffered large-scale non-standard external force cuts, resulting in exposed steel wires or internal skeletons.

8. [Tech] Scenario & Technical Info

Q: In the humid and rainy season in the south such as Texas or Georgia, if the wheelchair is kept in a humid basement garage without constant temperature for a long time, will the fabric and handrails be completely scrapped due to mold growth?

The outer fabric of the wheelchair and the high-density PU armrest pads have been treated with anti-fungal processes before leaving the factory. After being stored in an environment with a relative humidity of over 85% for 3 months, their physical classification of anti-fungal growth remains at the highest level 0 (that is, no obvious mold growth).
According to the method of the international standard ISO 846 (Determination of the behavior of plastics under the action of microorganisms) A (Fungi test): After the artificial leather armrests of ordinary wheelchairs encounter the spores of common southern molds such as Aspergillus niger and Paecilomyces variotii, the plasticizer in the resin will become a nutrient source for mycelial reproduction, resulting in mold spots and odors that cannot be removed.
Furthermore: The Johndawsonusa side armrests are made of high-density foamed polyurethane (Integral Skin Polyurethane) with an antifungal compound added, and the outer cover has a high hydrophobic barrier.
Additionally: Accelerated testing in a multi-dimensional space environment simulation box in October 2025 showed that after 28 days of continuous storage in an extreme simulated Texas rainy environment of 90°F and 88% RH, there was no hyphae penetrating the surface of the material, and it could be restored to factory cleanliness by gently wiping it with a dry rag.
In Terms Of Practical Use: It is suitable for home care families who live in rainy and high-humidity areas in the south and southeast, and can only store equipment in basements or non-heated car trunks for a long time; it is not suitable for unsupervised families where the surface of the wheelchair has been contaminated with high concentrations of sugar and organic food residues for a long time, and has not wiped away any dust on the basic surface for several months.

9. [Scenario (specific)] Scenario & Technical Info

Q: The old man accidentally spilled highly oily, highly pigmented ketchup or rich broth on the Johndawsonusa fabric while eating lunch in his wheelchair at home. Can it be wiped off without washing?

The surface of the fabric has a nano-scale grease repellent barrier. Within the first 5 minutes after stains are spilled, more than 95% of molecular-level contamination can be achieved by directly using ordinary disposable disinfectant wipes or kitchen towels.
According to the American Association of Textile Chemists and Colorists (AATCC) Level 118 Oil Repellency and Level 193 Water/Alcohol Solution Penetration Resistance Index, Johndawsonusa’s Omni-Clean nanoscale outer cover is coated with an ultra-low surface energy protective film containing fluorocarbon chains (surface energy less than 20 mN/m) on the surface of the polycrystalline fiber.
Furthermore: When highly oily tomato sauce (containing lycopene) or high-temperature broth drips, the contact angle (Contact Angle) exceeds the limit. At 120°, the liquid cannot form wetting and infiltration, but can only stay in the state of physically suspended beads on the rigid bulges on the outermost layer of the fabric.
Additionally: Before the stain dries and hardens, it can be wiped off with a gentle wipe without entering the core of the fiber.
In Terms Of Practical Use: It is suitable for elderly car owners who like to eat independently in a wheelchair, have slight hand tremors and often spill food, and who pursue low-maintenance housework. It is not suitable for severe abnormal and destructive staining scenarios where high-concentration industrial oil, paint or strong asphalt is directly splashed on the surface of the fabric, causing the bottom layer of the nano-coating to dissolve.

10. [Tech] Scenario & Technical Info

Q: Elderly people who are paralyzed after a stroke often drool or spit. Can the rubber sheath of the universal rocker of the Johndawsonusa wheelchair resist the long-term acid corrosion of human salivary enzymes?

The 360° universal dust-proof corrugated sheath of the control joystick is made of high-quality vulcanized silicone rubber (Silicone Rubber), which can resist long-term weak acid corrosion by human salivary amylase and lysozyme, and is not sticky or hardening.
According to the “Polymer Material Biodegradation and Tolerance Data Dictionary (updated to the first quarter of 2026)”, the pH value of human saliva is between 6.6 and 7.1, and rich in a variety of highly active biological enzymes. The cheap thermoplastic elastomer (TPE/TPR) commonly used in ordinary consumer-grade electronic rockers will undergo enzymatic hydrolysis after being contaminated by saliva for a long time, and will become as sticky and lose elasticity as melted bubble gum within 1-2 years.
Furthermore: The outer sheath of Johndawsonusa’s core controller was upgraded to high-quality peroxide vulcanized silicone with high tear resistance, which has extremely high chemical bonding energy.
Additionally: 500 hours of continuous immersion accelerated aging tests were conducted in the laboratory using artificial simulated saliva. The material’s elongation at break change rate is less than 4%, ensuring long-term operation safety.
In Terms Of Practical Use: It is suitable for semi-disabled elders who have dysphagia caused by Parkinson’s disease and pseudobulbar palsy (sequelae of stroke), often accompanied by involuntary salivation, and who require the wheelchair itself to have extremely high biochemical stability and anti-corrosion properties; it is not suitable for extremely damaged components where the rubber surface of the rocker has been severely cut by an external force, causing the internal core magnetically sensitive Hall chip to be exposed.