you could probbably get away with closer to 100psi if you wanted to, just as long as your not blowing over componets. Most of the stuff inside electronics isint super delicate. however some are. I use a paintbrush to clean things when they need it, followed by blowing the loose dust out. Airbrush sounds fine. Make sure you unplug the unit first. You'll want to make sure not to move any of the componets when your cleaning inside, There are some things that can affect performance by simply moving them.