You are cleaning your firearm, you rinse it with cleaner or dip it in kerosene and scrub, then blast it dry with compressed air.
Many of us do this, I know I do.
Well I just finished reading a journal article (sorry no online version) regarding the issues of inhaling solvents that have been atomized by compressed air and a rapidly increasing concern over the damage these micro-particles can do to the lungs [EDIT: because of how long they remain in the air, 15 minutes or more, so you shouldn't "blow" and then take your mask right off). The article strongly recommends you wear, at minimum, a paper filter mask while blowing things clean with compressed air (and eye protection of course).
Just thought I'd mention it as a PSA in case anyone cares.
I now return you to your regularly scheduled threads