Passat (B6) :: Cannot Clean Windows Completely And Fog Way Too Easily?

1. Impossible to clean them completely. I've experimented with lots of brands and combos of cleaners and wipes - Armor All glass wipes, Invisible Glass (gets the best results so far), Windshield Wonder (wet and dry pads), newspaper, shop towels, microfiber, chamois (wet and dry), lint free towels. As much as I can, I wipe horizontally across the entire surface inside and vertically on the outside so I can see whats amiss. Nothing gets them totally clean, always some sort of streaks or residue show up when the sun or a headlight hits it just right.

2. They fog way too easily. This may be a symptom of the insane amount of snow and rain we've had in my area in the year I've owned it and the resulting overall humidity. But lately I have noticed the rear window begins to fog when the temp drops below 50 degrees F. All the windows fog if more then 2 people are in the car unless I have the A/C going. There is no wetness in the carpeting from a leak into the cabin. I don't know if any drains are clogged, nor do I know where to look for them.

I've owned a few VW's and they have all had the same types of issues compared to other car brands I've owned, but this Passat seems to be worse than other VW's. Or maybe I'm just more concerned with having a nice clean car now.