My boy cat scratched my girl cat in the face. Seems to have missed her eyeball but she has a very small cut on her waterline, upper eyelid and just below her eye. How to clean?

Taking her to the vet ASAP, but it’s 5am and I’m not sure how I can clean it properly without hurting her.

:( I’m so worried. It doesn’t look that bad and she isn’t squinting but I don’t want it to get infected.