I'd run it by the vet, maybe, but I'd do a couple betadine soaks, where you dilute it to weak tea color, and let him soak in it. The thing with snakes is you should soak them in plain water first, because otherwise they drink the betadine soak. So you have to make sure they aren't thirsty.
Triple antibiotic is good too, but it gets everything stuck to it.
I think she looks great. This will be a good example for the future, if anyone needs to be reassured that the lip will go back to normal!
I don't know if snakes enjoy being handled, but it might be nice for her to just have some time when she isn't being "treated." Sit and watch TV with her and let her just cuddle with you.