UKPassats

I have terrible trouble cleaning the inside of the windscreen on my b6 wagon, ive tried everything to get it clean but it always leaves streaky marks or a cloud effect, when i 1st purchased the car it came with gard X, and in this package was a cleaning product for windows etc that you wipe on and it eliminates grime build up on the screen but even this i cant seem to master, any tips guys that can help me??

many thanks
simon