CLEANING AND DISINFECTION
No decontamination method is proven to be 100% effective at deactivating all pathogens that might be on any given respirator. Air99 LLC does not warrant that the methods described herein will destroy all pathogens that might be trapped on or in the Airgami respirator as a result of typical usage and wear.
The following are recommendations for how to heat the Airgami respirator without damaging its filter or structure. In the literature, heat is considered an effective method for destroying or deactivating viral, bacterial, and spore contamination of respirators if the respirator can take the heat.
Excessive heat will damage the Airgami respirator. Do not expose it to temperatures in excess of 212°F (100°C). These excess temperatures can easily occur inside a conventional oven with heating elements or on the surface of a ceramic or glass dish placed inside a microwave oven.
HEAT DISINFECT AT YOUR OWN RISK.
AIRGAMI RESPIRATOR MATERIALS ARE MADE OF PLASTICS THAT CAN MELT IF THEY COME INTO CONTACT WITH ANY SURFACE HOTTER THAN 212°F (100°C).
SURFACES HOT ENOUGH TO MELT THE AIRGAMI RESPIRATOR EXIST INSIDE MOST CONSUMER OVENS WITH A HEATING ELEMENT.
CERAMIC OR GLASS SURFACES CAN HEAT UP INSIDE MICROWAVE OVENS AND GET HOT ENOUGH TO MELT THE AIRGAMI RESPIRATOR IF IT COMES IN DIRECT CONTACT.
DISCARD AND DO NOT REUSE THE AIRGAMI RESPIRATOR IF IT HAS ANY VISIBLY MELTED MATERIAL.
HANDLE PROPERLY. DO NOT CRUSH. HANDLING BY THE HARNESS LOBES OR HARNESS IS BEST.
The Airgami mask is made of durable, waterproof materials that can last a month or more of daily use, which can include rinsing, drying, and heat disinfection.
Freshen the Airgami mask between uses by rinsing it in clean tap water and then air-drying on a clean surface or paper towel.
MICROWAVE OVEN DISINFECTION METHOD 1
Airgami can be rinsed and microwaved. Rinse the mask inside and outside and rinse the harness straps under cool tap water. Shake off excess water and place onto a paper towel on a cold microwaveable plate. Place the mask and plate onto the microwave turntable. The microwave oven's power rating should be between 1,100W and 1,500W. Turn oven on high for 3 minutes. The mask may appear to soften very slightly. WARNING: NOT ALL MICROWAVES ARE THE SAME. STOP IMMEDIATELY IF THE RESPIRATOR DEFORMS OR BEGINS TO MELT. DO NOT MICROWAVE THE RESPIRATOR ON A PLATE THAT IS ALREADY WARM FROM BEING IN THE MICROWAVE. THE PLATE THE RESPIRATOR SITS ON CAN GET HOT ENOUGH TO MELT THE MASK IF IT ABSORBS ENOUGH MICROWAVE ENERGY, SO START WITH A COOL PLATE AND PUT A PAPER OR CLOTH TOWEL BETWEEN THE PLATE AND THE RESPIRATOR, OR PUT THE RESPIRATOR ON A WOODEN SURFACE IN THE MICROWAVE. PUT A SMALL BOWL OF WATER IN THE MICROWAVE OVEN ALONG WITH THE RESPIRATOR TO ABSORB SOME OF THE MICROWAVE ENERGY.
MICROWAVE OVEN DISINFECTION METHOD 2
Fill a 6.5" x 6.5" (17cm x 17cm) glass container with around 60ml of distilled water. Cover container with polypropylene mesh from a produce bag and secure in place with a rubber band. Place mask on top of mesh and place container on microwave oven (1,100W to 1,500W) turntable. Run oven on high power for 3 minutes. Details from experiments are provided here. WARNING: MASK MATERIALS MAY MELT IF THEY COME INTO CONTACT WITH ANY SURFACE HOTTER THAN 100°C.
DRY HEAT DISINFECTION METHOD 1 - INSTANT POT
This is a super simple method and largely foolproof. If you own an Instant Pot cooker, place the mask inside the Instant Pot stainless-steel inner container on top of the wire platform. Place the top onto the Instant Pot. Run the Slow Cook program for 30 minutes. Turn off the Keep Warm function. The Instant Pot Slow Cook function heats at 190°F - 210°F (88°C - 99°C).
STEAM DISINFECTION - INSTANT POT
Add 1/2 cup clean water in the Instant Pot inner container. Put the wire platform in the container. Loosen the harness and fan out the side bellows. Put the Airgami mask on top of the wire platform inside the Instant Pot. Make sure the elastic harness isn't in the water or against the side of the stainless container. Close the Instant Pot lid. Press the Steam button and adjust the time to 5 minutes and the pressure to low. Wait until the Instant Pot finishes then remove the mask and set out to dry on a clean surface or paper towel.
DRY HEAT DISINFECTION METHOD 2 - OVEN
WARNING: THIS METHOD MUST BE DONE WITH GREAT CARE OR YOU RISK MELTING, AND THEREBY DAMAGING THE RESPIRATOR. PRE-HEATING THE OVEN IS ESSENTIAL BUT NOT A GUARANTEE OF SUCCESS SINCE OVENS CAN BE DIFFERENT. Place mask in a pre-heated oven at 195°F (90°C) for 30 minutes. Keep the mask away from the oven's heating elements as there is a risk of melting the mask by overheating, especially if the oven is warming up. Only put mask in a pre-heated, temperature-calibrated oven. IF THE MASK SHOWS ANY SIGNS OF HAVING MELTED, DISCARD IT.
Decontamination of surgical face masks and N95 respirators by dry heat pasteurization for one hour at 70°C, published by the National Institute of Health (NIH) concludes that surgical face masks and N95 respirators can be disinfected in dry heat.
Microwave-Generated Steam Decontamination of N95 Respirators Utilizing Universally Accessible Materials, decontaminates an N95 mask by microwave steaming it for 3 minutes over a bowl of water. The microwave oven should be between 1,100W to 1,500W.
Inactivation of coronaviruses by heat, destroys a long list of different coronaviruses with 176°F (80°C) heat, including SARS, MERS, and MHV strains.