Your decals goes on the outside of your window.

CLEAN: Clean the OUTSIDE of your window

PEEL: Peel the decal away from the paper backing.  Make sure all the decal comes with the tape.

 STICK:  Position the decal on the window surface and stick it on the window.  Rub the decal with your hand to make sure it seals on the window.

PEEL:  Slowly peel the tape away from the decal, if it lifts put it back on the window and rub it until it sticks.  Once stuck on the window it will stay.