Hi. I like all others have a problem when the sky is blue and the sun in shining on my screen. What I am looking for is a antiglare film to attach to my screen. Does this excist? I've found lots of these on ebay, but they all seem to be for a sertain screen size for ipods or laptops, but nothing for 10.4" screens and if I found one, would I still be able to use the touch function?