Im using my ipad as the test subject as amy residue on black glass will show up. I spray it on the screen directly, spread it out and let it flash. It will take around 5 mins to fully flash and dry but will leave a slight haze which again, theres no way to get off but to buff with a mf towel. Im not sure if my foam is contaminated or something. In my experience, Opti seal leaves a slight haze and will have to buff with mf and its not a true WOWA. I don't know how you are not getting the haze because im using a 500 lumen led light to be able to see if its fully flashed and to see the haze