some say bake and some say dont, tell ya what, yes you cn filter, but filtering does not kill all viruses and bacteria, neighther does BA, I dont see why folks dont think heat will kill anything, when its a fact that heat is a well known killer, it will in fact kill most things that filtering cannot, lets take lead for instance, lead will escape the filtering process, and no im not talking about lead dust, im talking about lead period, their are many forms of lead and their are also particle that are bigger than .2microns, heat up your oil man, and you can do it at 250degrees for 20-30 min, than you can even repeat the process 3 times if ya like after oil has cooled down. just my opinion and experience.