If you pull the needle out from the back every paint residue from your painting session will end up in the body. It is instead better to unscrew the nozzle and then gently push the needle up to the front.
1: As already mentioned, unscrew the nozzle and push the needle out front to not clog up the body. 2: Don't bend your needle on the table like that. Just dip a bit of tissue paper in airbrush cleaner and pull the needle back through that while holding it in your hand
