Originally Posted by Spacebug
I had aftermarket tints fitted to mine by a reputable company. The effect you are describing is caused by light TIRing (Total Internal Reflection) off the film which is covering the elements. because the elements are slightly raised the film can not sit flush up against the glass. It does it off the top and bottom edges. I suspect the top edge reflects light down the window and the bottom edge up the window. Not a lot you can do about it really. I've got used to it and don't really notice it now.
Cheers mate makes sense, that was what the fitter said. Guess when the sun comes back to Scotland it be so bad.. I'm starting to get use to it too..