I always use cheap hairspray (the pump kind, not the aerosol). I read that it is the alcohol in the hairspray that is the active agent and that you can use plain rubbing alcohol if you want to or if it is a rally stubborn stain. Good luck!
I had a small ink stain on a pair of my favorite shorts a few days ago. I just pre-treated it with a little, Gain and washed it as normal. That did the trick for me.