[Abigail decides to communicate by text, because the video is a bit unsettling and she knows how it feels to have people look at her and be bothered by her scars. She doesn't want to look at him in the same way.]

Warm water mixed with a small amount of vinegar might work. Or a gentle soap and water.
Don't use hot water.
Or go to a store that sells action figures and ask them if they sell cleaning solutions.