And when all else fails, boob cream, crack cream, crack sealer and you still have the corner thumb cracks like grand canyon crevises, go and get some "Amantle" cream, it's not cheap and you have to order it from the US. It's about $15 for a 1 oz tube, good for the winter.
Matter of fact, I even tried the 100% udder cream right from a farmer, did nothing but make greasy thumbs.