For removing stuck shed on a Ball Python's head, when the snake was head-shy, I've had good luck using a pillow case. Wet it thoroughly with tepid water, wring it out, put the snake inside and tie the open end shut, then leave it alone for an hour or so. Be sure to wring it out well enough that air can get through, so you're not drowning your snake. The humidity inside softens up the dry skin, and slithering around inside the cloth rubs against the fabric enough to work the patches off. Be sure to use a 'sack' or pillowcase large enough for the snake to move around inside, but not so large that it won't be pressing against the fabric when it does so. It's especially good for areas on the head, since they tend to nose and push against the cloth trying to find a way out. Warning; You then end up with a pillowcase full of bits of snake skin that are really hard to entirely clean out, so use one you don't plan on putting onto a pillow after that.
Personal experience from a long time ago, if anyone has any concerns about this method please mention them!