Don't try this at home!
Floyd's question  on Varda's Pain au Levain blog entry:
The wet towel idea freaks me out. They don't catch fire? Do you pull them out after a few minutes?
reminded me of an incident that happened a few weeks back but forgot to post about. Liike many others on the forum I have been using Sylvia's wet towel steaming method for a while now. It works wonderfully and I am a firm convert, but you do need to be careful that the towels don't dry out or take them out before they do. If not, this could happen to you:
A little bit longer and they could have caught on fire. I don't know what was wrong with me on that day. I just got distracted, I guess. If you are the absent minded type then this is not the steaming method for you!