I usually use a little hand sanitizer for water-free clean ups. This tones down the goat-like scent that descends after a few days. It also makes DW a much more amicable tent-mate, especially when used on my feet before bed (geez, what died in here?).

Even rinsing with water is a good idea, to remove the salts that can cause a lot of skin irritation, usually in places where you'll suffer the most on an extended trip.

EDIT: Please don't use methanol for cleanup. It's quite toxic, and can be absorbed through the skin.