Grey/white patch on BP's nose?

Hi all, I've had my normal BP for a few months now and recently she's developed a grey-ish/white patch on her nose, just to the side of her nostril. I spoke to my local reptile store, and they said it could be a bit of stuck shed. But it doesn't seem to be going away or coming off, although I have given her a couple of quick soaks in case it was stuck shed. Her temp on the hot spot is 30c, using a thermostat and the humidity is between 50 and 60. This did appear when the humidity was higher though (about 65/70) so could it be caused by that? I've put a link to a photo of her nose and of the setup below. Thanks :)

https://fbcdn-sphotos-b-a.akamaihd.n...fd8d2f3dfdb460

https://fbcdn-sphotos-d-a.akamaihd.n...cfa014ccc5a82d

I'd try wiping it with a damp paper towel - but it looks kind of like a scuff caused by it sticking its nose into things. :)

Awesome, I'll do that, thank you! :)