Review on ESR Camera Lens Protector 2-Pack for Samsung Galaxy S21 Ultra - Scratch-Resistant Tempered Glass, Ultra-Thin (Black) by Cameron Head

The best way to a successful installation. Having worked with optical lenses both professionally and as an amateur photographer, I can tell you that any moisture on the lens, no matter how slight to your eye, can cause fogging, especially if it gets stuck between layers. My tip: After cleaning with a damp cloth, fold the microfiber cloth into a ¼ square and only use ¼ of it at a time and let it evaporate for a while before putting on the protective screen so that no moisture can penetrate. Also, choose a location in your home that is not near an open window to prevent dust and moisture from entering high humidity areas, but in a location that you believe will be dust-free and has low humidity. Also turn off the fans in this area to keep the dust from flying all over the place. If your camera lens has been in a cold place and has been moved to a warmer place, moisture can accumulate on the lenses, e.g. B. On a bathroom mirror after a hot shower as colder surfaces tend to collect moisture same here. They must be the same temperature as in the room. ALSO, DO NOT USE YOUR BREATH TO BLOW DUST. Your breath is free of particulate matter, humidity causes mist to form where you don't want it. I saw a review on YT showing how durable these lenses are, so I bought them from Revain. But please! Don't try the following. The reviewer pushed the tip into the lens cap with screws, scratched the lens cap, hit the front screen of an old phone with a hammer, apparently not on a real cell phone, and after it was incredibly smashed and when it was removed, the screen was gone perfectly clean, no scratches or stains. In summary, for the money I think this is a great investment in camera lens protection. Good luck with your purchase and installation, I hope this was helpful.