For that small amount of stuck shed you should be able to soak him and work it off with no problem. For more problematic sheds (I hate winter) what has worked for me is this. I get a small tub with lid (most of them are already in tubs) and use newspaper as substrate. Dump about 1/4-1/2 cup of water on the bottom, to wet the newspaper without causing them to be swimming. I place the tub over the UTH (on a thermostat) set to the normal temp, and then leave them in there overnight. 3/3 times I've had to do this (I hate winter...lol) the shed was off by morning. I just dry out the tub and replace the newspaper once it's off so they aren't soaked.