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.
All you need to do is cut some paper towel into 3-inch strips, roll up the strips into little rectangles, and then insert those rectangles into the gaps in your GoPro’s case.
Voila! The paper towel inserts should help keep your lens clear of fog, and they’re incredibly cheap and easy to replace after they’re used.
Image credits: Video and still frames by Ho Stevie!