craftgrrl | steaming of stamps of envelopes

While messing out some old boxes I found one filled with old mail, and lots of old stamps that I can use on projects. So now I am curious, what would be the easiest way to steam of stamps of envelopes? I tried it above a pot with boiling water but that isn't working well.. Any ideas?

edit: Heh, I would have never came up with the bowl of warm water! I did not know anything else then steaming stamps of. Thanks for the suggestions, I am going to give it a try right now:)

edit2: Owh, this works like a charm!! *excited*