This has probably been asked a thousand times by every pistol newbie but is it safe for a pistol to leave it with Co2 in it.

Obviously if I was going to store my gun for a long period I would de-pressurize it but from day to day I often leave a half used or still quite full canister in the pistol and don't fire it again for a day or two, is this bad for my gun?

Logically I would think it could be bad for it but I sometimes don't want to shoot off more than a few clips [I shoot in doors and have to watch sound sometimes too] and de-pressurizing then would be horribly wasteful on gas

Sorry for the continuing ignorance guys!