Not sure if I am/was the only one with squeaks from the roof, but anyway I'd thought I 'd share my solution:

Petroleum Jelly (vaseline) on all seals and 2 automotive/marine weather strips (Home Depot): 1 on the front and 1 on the rear side of the roof. This way the paint on the inside of the roof doesnt directly rub the seal anymore.

My car is now totally silent!!!

Did a quick water check by washing the car and no leaks...