Hand Washing _ Winter in Camping & High Adventure Posted Monday at 05:58 PM Cubs? Once a day put up a wash line with warm water and get them all through. That way nobody has more than a days worth of grime, and that's reasonable. I always volunteer to wash dishes at night so I can clean my hands in hot water before I take my contacts out. Below zero, doesn't matter. Feels wonderful. I've been told hand sanitizer is worthless unless you use a huge amount.