They need to practice what they preach "HEPA air purifiers filters are also dirty, concentrated sources of pollutants and germs, and they are an ideal breeding grounds for bacteria". Their words they should stop selling the Air Fit then it just shows dishonesty
What precautions should I take when changing filters?
In general, it is wise to assume that filters have active microbiological material on them. Whether this represents an important infectious disease risk from viruses is not known, but the precautionary principle would suggest that care should be taken. This becomes particularly important in any building (including a home) where there are known or likely cases of any infectious disease including COVID-19 and also extends to portable air cleaner filters and vehicle cabin air filters. Filters should be changed with the system turned off, while wearing gloves, with respiratory protection if available, outdoors if possible, and disposed of in a sealed bag.
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And the suggestion to put it into your dishwasher - where you was all your eating utensils seems a tad sketchy too.
You can understand why they made disposable filters.