I'm not sure where to begin. I got a PM Sam on ebay for my cousin. Sam needs some TLC and I'm not sure where to begin.

1) Her hair needs a Downy Dunk (how long do you soak it?)
2) she has some pen/crayon marks on her arms and legs. I wiped them off with hand soap and they faded but are still there. I heard somwhere that Oxy works? what kind?
3) She can stand on her own, but not well. Her legs are a little loose. How do you tighten them up?
4) I also need to tighten her neck strings but I can't get them untied. Any suggestions?

Thanks,
Laura