To Apply: First, clean the application site. While the window is still a bit damp, apply the cling with the smooth side touching the glass. Press entire surface against window firmly by hand or using a scraper tool. Decals should self adhere, if problems arise try warming the decal up with a hair dryer or in warm soapy water and reapply.
If placed in a bright window, decal will project rainbows in direct sunlight. Different designs in different vinyls create varying levels of this effect.