The one thing a lot of people don¡¯t do is after you have clean your airbrush, don¡¯t just leave it that way, pour some kero into a lid and allow the straw of the airbrush suck some in so you are blowing kero out in a mist, then dunk it back in again and one small squirt and leave the airbrush with the kero in it, thinners is very harmful to O rings by leaving the kero in the gun it keeps the O rings nice and soft, I leave my airbrush this way for 6-7 months of the year because I am away from home, when I next want to use it I just pour some thinners into a lid and start sucking it through the airbrush allow the straw to blow itself clean a few times and it is then ready to start painting again.