Orange cleaner, green 3M pad, elbow grease.
Scrub the shit out of it, wipe it down with water to remove the cleaner. Your board will be dry as hell. It will LOOK like there's a white film on it, but it's not a film at all, it's your base without any wax.
Then you're good to go for a fresh wax.
"Never attribute to malice that which can be adequately explained by stupidity."
10/11 - 24, Smote on Feb 13