Windscreen Still Smearing!

[gilliambot]

So I have tried most things trying to sort out the smears on my windscreen, and have replaced to brand new wiper blades. But the smear is still there, and for some reason there is alot of resistance when the blade wipes the screen causing a very annoying squeak. Any suggestions would be greatly appreciated.

[gilliambot]

cheers guys. Think I shall try both suggestions.