Is it better to air dry or cover up a cut or broken skin so that it will heal faster?

Cover!: Studies show the best healing time is when the cut is kept moist. Use an antibiotic ointment and cover with a bandage. Change this twice/day with gentle cleaning to be sure it isn't getting infected. If redness, pain, or discharge increase, see your doctor.

Cover up: Dry wound is a dead wound. Moist wound healing is the current standard for healing wounds.