The suckers on the silver screens are not sticking to the windows, what can you suggest?
I'm not sure why this would be happening as we sell hundreds of these screens without problems! We can only advise to check that the glass is clean and that the suckers don't overlap the small black dots printed around the edge of the glass as this breaks the seal.

Failing this, offer to send the customer replacement suckers which can be ordered online free of charge.