I've heard that with duster you have to lube more often, I think it's because it dries out the seals faster or something. Also I don't think you can use duster any more because the formula has changed (too many kids sniffing it and getting high) also the added bitterant may have something to do with it.
All in all just go propane. Unless you have a lighted flame right next to where the gas escapes I highly doubt that your GBB will "explode". In fact the most it would do is just light on fire for a second and when the slide slides forward it should cut off the gas. Have you ever done the "fireball" thing with a lighter? The worst that will happen is probably that.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE