I'm a germophobe and yep the constant washing combined with the cold is a recipe for cracks.
Said it once, say it again...take it from someone in a sub-arctic climate: bag balm is the best thing you can use, bar none, and it's cheap.
Some may find it difficult to get past the fact that bag balm is designed for cow utters, but hey, milk 'em if you got 'em I always say