It says on listerine and other mouthwashes to gargle and spit, dont swallow.
My point is, dont be too quick to use metho.... acetone?? etc only use reptile friendly chemicals or stuff it is common knowledge/proven to not harm your snake.
Like I said earlier, people up here spray dettol on cane toads because reptile skin is so porous and absorbant.... they take about 2 hops in any direction... then die! Next day they have a texture like a surgical glove full of water (what they sound like when you kick them towards the rubbish bin) My advice would be try to mechanically unhitch the bite, if that fails, tickle the tail, blow your breath at its nostrils, head (or tail tip...last few centimeters) under running water, ice block at bite area on skin near its nose, then if you must use a chemical, try something like rept-hand or F10 near its nose.... I know metho is bad for them, I got scolded by a couple of local breeders just because I mentioned it. Even the fumes of metho can burn the snake, inside or out.... dont risk it is my honest advice. You might not mean to put any metho ON the snake, but trying to open a bottle with snake attached to your hand, you might spill some on the snake by accident?
I say again, dont use ANY chemicals to get it to release, unless you are SURE it wont injure/damage your snake. Sorry if you think I am over reacting, I just think it is cruel to torment them with poisons.... like, would you throw a bucket of petrol on two dogs that are fighting? NO, because it is a fumey, dangerous chemical!_