an alcohol bath is the most popular way of doing it. i actually haven't heard of anyone using anything else. if you let it soak in the alcohol for a while (30 mins) you should be able to pretty much wipe it off. I have only used 99.9% but i know most people use off-the-shelf 70% (or something like that) from walmart and that seems to work for them. The secret is in the soak....just be patient