Yes, I know, and that's why I was so sure she was dead.Not 100% sure but your T' could have Nematodes (Small round worms) that could be what is causing the white around the mouth if this is the case there is a very good chance she will die in the future. Once she molts remove her from the cage and clean that cage very good with bleach then watch her over the next few months if white forms around her mouth again she has nematodes.
There is treatment but I doubt you will pull it off you'll have to clean the mouth with warm water & Qtips and a drop of 98% alcohol. There is a real nice write up about Nematodes in the new BTS journal By Peter Falck
Nematodes could be the explanation on this white stuff, but the white seems to be dry, and she hasn't had any oher symptoms of nematodes.
Three of my other T's have the same substrate, and all four has gotten from the same batch of crickets, but the pokie here is the only one with the white stuff on her. But I've been told that pokies are more "responsive" to this shit.
But to be on the safe side (or at least safer) I've separated all of the tanks now.