Pine Tar stains!

Ok gents I need some help or the wife is going to kill me.

​

I ordered the pine tar soap/shampoo/conditioner/deodorant. I absolutely love them (I have tired almost all of them). However this thing just stains the tub / shower curtain and its hard as heck to clean.

What is the best shower cleaner to cut right through it? Also, anyone have any luck with a shower curtain that just doesn't stain black instantly?