Headlight tint help

Tried putting on headlight tint today, couldn't get it to stick. I cleaned them good with windex first so being dirty wasn't the issue. I sprayed them down again and then tried to apply the tint, and just couldn't get the damn tint to stay down. Has anyone done this and have any tips for me in case I try again sometime?

On a plus note though, I finally installed my clear fog lights, so I got something done today.
 
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