Homebrew PCBs

Hi Everyone,

It has been a while since I made some circuit boards, and I can not 
rememember what I used to clean the blank pcb prior to ironing on 
the toner.

What do you suggest for cleaning the board (Isopropyl Alcohol, 
Varsol, Paint Thinner, Methol Hydrate, or something else)?

Thanks for your help.

Steve