I cleaned and cleaned and cleaned again, used the stickers, cleaned again, still messed up the first one. The second one was aligned perfectly and still I got 3 tiny cat hairs between the screen and protector and it's driving me crazy because theres big bubbles that wont go away because of the tiny hairs. They're just so finicky and you need a vacuum sealed room to apply them in it seems. Theres 3 layers, make sure once youve peeled the number 1 layer off the back, the number 2 layer also peels off and leaves the actual protector remaining. Dust 100 times and vacuum a good dozen, kick your pets out of the room, dedicate a full hour to cursing over some stickers and you'll be fine. Glad it came with 3 because I'm using them all on the first go!