Airsoft questions?

I just recently bought an airsoft pistol. I am also concerned about keeping it in tip top manner.

When I bought it, I was told that I should keep some gas in it when I put it away, so i'll do that. But is it bad to dry fire an air soft gun? Meaning, that i'd pull the trigger, but i'm not really shooting anything.

And if it's bad to do this with/without any gas, or the magazine loaded in it. If possible, can you guys recommend me some websites that talk about the health of an airsoft gun? Thanks! (:

Did you see this article?
http://www.airsoftking.com/airsoft-guns-maintenance.htm

well gun saftey rules r Never aim at somthing ur not willing to shoot. Never dry fire a gun or bow. keep the barrel clean to. gas one r sweet. u lucky. lol