For what its worth, I have had the valve in a 110g canister fail. Probably used it half a dozen times, and after the last time (still half full), it wouldn't close. Tried reattaching the stove to try and re-seat the valve, didn't work. Luckily I was at home, so I just set the can away from everything until it emptied itself. Not a huge deal, if I was camping I just would have left the stove attached (inconvenient, but would have saved the gas).