There's cans and there's cans. I have been carrying one in my "doctor's suitcase" for a decade and I've noticed huge - and I really mean HUGE - differences in various brands. Some have been weak like a human blow, going down to a breath strength level halfways of the can. Then there's those which start promisingly but get cold and weak even with short bursts when the can is less than half full. The ones I currently use have the same amount of air by weight in a can half the size by volume than the previous ones. Inflammable just in case, although they cost more. I find them strong enough for cleaning, yet gentle enough for not blowing any components off.