I have a different theory to present.Originally Posted by nrls2000
Many people claim magical substance in window reduce satellite reception and report they get better signal after placing GSP on outside. That's because Lilliput is not interfering when the receiver is placed outside not because of tint or window.
I know this from my experience because when I'm using a laptop, GPS locks fine even though the receiver is in the very same position. When I was bench testing Liliput in my room, my color TV about 4feet away from lilliput (that's longer than the distance between Lilliput and GPS receiver on dash) shows funky color distortion and noise.
You might want to change your refresh rating next time your GPS wouldn't lock.