Drying your nails under a UV light, or using an aerosol drying spray? Dermatologist Dr. Lindsay Shipp says: Go for the spray. Light-assisted drying can expose your hands to UV light for 10 minutes at a time – which can eventually lead to wrinkling, brown spots and even skin cancer. With the quick-dry spray, you may breathe in some chemicals, but the liquid only stays on your skin for 10 seconds before evaporating. Which makes the spray a much safer alternative.