The wart will get a scab, then it may turn black. after that its dead and either it will fall off when you dont know it or you can pick it off.. if your a picker hahah
Don't mean to put a dampner on things but I had 2 attempts at freezing and it didn't work for me. I know it works great for some people. Weirdly mine dissapeared after my last holiday abroad, I don't know if it was something to do with the sun or not.