Halo effect on some film?

So heres something i need some extra help on - some films cause a halo or double image effect when first installed - heared about it one or twice..but to be frank still not really sure what the root cause is - any advice or experience guys on this?

Do you mean like silvery lines in places?

I had this recently with the Suntek EX range in 5%, it looks as if there is a mist between the film and the glass in places, when first installed. I have had this before with Solargard also.
I came to the theory a while ago that leaving the film on a peel board for a prolonged time, whilst stripping the car etc had some effect on the film - the "mist" seemed to greatly reduce if the film was placed onto a peel board immediatly before installation and not left there for a time. It has only occured with me on the cheaper dyed/budget range of films.

Oh and it does dry out!

On side glass or are you talking about rear screens on the de froster lines? (which i dont think you are Nik?)

Patch Haze?