 It can be incredibly confusing to try to navigate all this stuff online. How much do you wear? When do you put it on? How frequently? He was joined by Englewood Health dermatologist Dr. Ali Hadi. People often ask me, do I need to use it on a cloudy day, on a rainy day? And the answer is yes, you do. The skin cancer-causing UV rays are still out there. It should be reapplied every two hours and be labeled SPF 30 or above and water-resistant. NASCAR has introduced its first electric race car. Monica Ricks takes a look.