My headband sensor pad gets pretty oily after a while, and the Woolite washing is less than convenient. It takes a while, adds physical wear to the pad, and then takes all day to dry.
Since the sensor pad seems to wick skin oils pretty quickly, my goal is to get those out and return the pad to dry/clean condition for longer use. One of the cheapest and least toxic solvents is simple rubbing alcohol. It evaporates quickly, leaves no residue, and is widely used for dissolving liophilic contaminants.
Typical drug-store rubbing alcohol is 70%, with 30% water. For faster drying, I got some 95% Isopropyl from Fry's and have been using it every few days.
I remove the electronic module from the snaps, of course, then soak the sensor pad in alcohol. Quickly, I then roll it up into a paper towel (flat) and squeeze gently. This works amazingly well! All the ick wicks right into the paper towel. Roll and squeeze a few times, and the pad is clean as new.
I know it's not orthodox, but man, it's much faster and easier than Woolite.