i went thru like a 6 month ordeal of that shit too. eventually i took my time and actually did it right an made sure eveerything was tight and in place....havent had a problem for over 6 months now. im not really sure what i did different. tho

what i would try is get the window in place and make sure everything is tight and snug then while the window is comepletely down spray silicone all over the seals then roll the window back up and leave it for about 12hrs till you move it again. it worked for me so thats what id suggest