 or e-gift card. Download the free Upside app now and use promo code EARN for an extra 25 cents per gallon cash back on your first fill up. That's promo code EARN. Many are looking to cool off during rising temps, but spending a lot of time in the pool can impact your skin and hair. CBS's Donya Backus has more. Swimming is a good way to cool off on these hot days, but spending all that time in the water can affect your hair and skin. That's because the chlorine that disinfects a pool and keeps the water looking crystal clear can also be very drying.