how to get rid of mold and glue seepage

hi guys, first of all, i'm sorry for my bad english as it's not my native language, i wrote this in a hurry. i have a basic g1 clawdeen doll that's very dear to me from my childhood but she got mold. i want to save her so i'm asking for your help. i initially wanted to add photos but for some reason i can't.

a few years ago i think i made a mistake while trying to clean the glue seepage from her hair and she got mold on her face now. i cleaned a bunch of my other dolls at the time and thankfully they don't show any signs of mold. how can i prevent them from getting mold when i try to clean their hair again?