How To Make A Shave Last Longer Than A Day By: Tom Ralya | - 1. Wet your skin in a mid-to-very warm bath or shower and let hair soften from the heat and moisture. Warm water opens the pores and.softens the skin / hair. Don't use HOT water. You don't want to shave dry skin. Shaving is a natural exfoliator and you'll clog up the razor with dead skin while putting yourself at risk for nicks.