Leave it outside overnight, then try make you a hot breakfast in the morning.. Then come tell us your result. :)I noticed performance issued with my canister when I slept in backcountry in 17 degrees weather. The first night there was no performance issue as I hiked in, but the next morning......sure did took a little more time to boil hot cocoa. I didn't put it in my sleeping bag nor a wool sock. I foolishly left it in my backpack letting the weather freeze the can.