I don't bake but before I take a shot I take the 2cc's or whatever my dosage is, put it in a little bottle (I use one that you'd get with IGH or other peptides), and hold it over a flame on the stove until it gets hot as fuck. I then let it cool, draw, and shoot. Aint nothing going to live through that. As for filter, .45 is fine as long as you're using quality oil and BA/BB. If you buy the cheap shit, which I've done in the past, might want to use a .22.