The designed pack is considerate to have tools for cleaning before applying screen protector.
1.open it from the back (there is a opening to peel)
2.use the alcohol prep pad to clean the screen
3.use the micro fiber clolth to wipe the screen again
4.use the dust sticker to stick remained dust
5.peel the screen protector to expose the adhesive side
6.carefully stick it to the screen
Then you get both your eyes and cellphone protected.