Clean the screen thoroughly with cleaning cloth provided in a dust free environment
Peel off the half protector with the 1 label (start with the top or bottom)
Place the exposed section of the screen protector on the screen, making sure it is straight
Finish peeling of the protector labeled 1 and applying it to the screen
Push the bubbles out (some use a credit card, others use the top of their fingernail)
Peel off the protector with the 2 label
If there is a piece of dirt/lint under the screen protector, you can try to use a piece of tape to lift up the screen protector. Once lifted hold the edges of the screen protector, and again use the tape to pick off the dirt/lint. Be careful not to touch the underside of the screen protector. You also have a chance of getting more dirt/lint under the screen protector.