What about contaminants in the air of the room?
I mean we're super critical about how sources go about keeping things sterile so wouldn't we want to be just as careful?
Don't brew in your bathroom and you should be just fine lol. If your beaker and shit is good and clean and you don't cough or spin in your product then your .22 filter will do it's job and you're good to go man. It's SUPER easy dude no joke.