I have been using this brand of screen protector for about 8 months. I bought 3 versions and each is great to use. The guide is simple but makes the installation process easy. After installing 3 of these, here's what I found out. First work in a very quiet room with little air movement. If you want to know what you're dealing with, turn on the flashlight and turn off the light. You will see a virtual blizzard of dust/hair/lint. So you lay your tablet/phone down in front of you, use a flashlight to illuminate the screen, and then use the included dust stickers to systematically stick and move the screen, picking up as much dust as possible, over and over again. . You won't get everything, but you will get a lot. Now remove the protective film from the lens sheet and start applying it according to the instructions. You'll still find a speck of dust or hair, but you CAN lift the lens, secure it with a sticky dust sticker, and put it back in. You can even use a sticky sticker to remove dust from the back of the lens. This is very easy and won't hurt if the lens eventually sticks to the surface of your phone or tablet. You end up with a very safe and clean installation. The product is very scratch resistant and I really love it. I will order more for new devices.
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