Help! my windows are a wreck!

hey guys,
last year when i took out my back window i cleaned it really well and used some varsol on it to get off the grease that was on it (dont know how it got there but it got there)...i stored it over the winter wrapped up in cardboard...i took it out today to put it in and i can hardly see through the thing!!! it is so hazy i feel like im wearing 80 year old glasses lookin through it...i tried to use glass cleaner of different varieties on it and nothing worked...the window is now in, i mean im sure theres someway to fix it (theres gotta be...) considering it was fine when i put it away last year....any suggestions of how i can get this stuff off? it looks like hazy water stains everywhere...i was thinking maybe trying salt and vinegar or fantastic, but i figured id ask here before i go ruining it even further...any help would be greatly appreciated

thanks
Matthew