How to Make DIY Anti-Fog Inserts for Your GoPro with Paper Towel

If you want to prevent your GoPro lens from fogging up when you're in cold and humid environments, GoPro sells Anti-Fog Inserts that you can stick into your camera case. If you'd rather not pay $15 for 4-use inserts, you can actually make some makeshift anti-fog inserts for yourself using some paper towel strips.