mercedes 320 cols

having great problems with merc cls 320 rear window, have done about half a dozen before but this one is proving to be a tricky one, i am getting problems with water not going away on the heater lines, ive cleaned them with everything in the book but still water ponds are there please help?

dont worry about it.....tint it.... make it clean.... ...let the film set up and dry....then push everything down with your finger....