My current understanding is that for the mask itself, a wipe down with a clean damp cloth, or alcohol wipe, is pretty much all it needs. 3M also sells specific cleaning wipes for masks. https://www.3mcanada.ca/3M/en_CA/company-ca/all-3m-products/~/3M-Respirator-Cleaning-Wipe-504-alcohol-free-1-pack/?N=5002385+8709320+3293806380&rt=rud If the o-rings start to go or the mask leaks, you can get maintenance kits too, though I’m not sure how commonly they’re sold and for the price of a new mask, if you used it that much just replace it entirely is my theory. For the filters, once they’re “used up” (which is a really, really vague and hard to determine amount of time), you pretty much chuck them. In the case of the N95/N100/P100 filters, there is a lot of talk about leaving them somewhere isolated, or in a sealed bag, for 4 or 5 days to let the virus in them die, before using them on a mask again, and then you can get several uses before they’re “used up”. I’ve also seen descriptions of baking disposable masks at a certain temperature to kill the virus faster, however in the case of cartridges I imagine the plastic would make that a poor idea, since it could melt. I don’t know how good this information is or if it has any validity. I don’t want to spread any false information, so please take this with a grain of salt. It sounds reasonable, but I don’t know to what extent this has actually been tested.