It'll probably be more stress on the snake (and you) to fuss at a bit of stuck shed on her face. With good husbandry practises and a nice complete shed next time, it will likely come off then. Just keep an eye on that area and of course monitor the snake if the situation changes and you suspect it's more than a simple thing like this.
Here's a helpful link to teach you all about the shed cycle so you can recognize it and react accordingly. Mesh lidded glass tanks are a bit tough to manage when it comes to humidity issues so if you find you are having problems with that, there's a ton of good advice threads on that too.
http://www.ball-pythons.net/forums/s...=332195#332195
