How To Remove TPE Silicone Doll Stains

I've cleaned my silicone dolls in the past using this method ... So, when my TPE doll got stained, I figured the same thing would work.. And it does.... 

I let the following sit for about a day, giving time for the inks and grease to dry.. The pen marks were pretty deep in there. I cleaned the first 2. The "Permanent" one took about a minute.. However, I was using just Q-Tips.. Soap does nothing to these marks.