The Mégane II Owners' Club

Hi I have a rain sensor fault and auto-light fault on my dash every time I try to use those functions. I am almost certain it is because when Auto Glass changed my windscreen they did not put a new clear gel in.

What I really want to know is, how to put the new gel in the sensor? I have removed the grey housing unit, but then I see the black sensor device with a silver metal clip on it and the black cable going in.

How do I remove and put back with out damaging anything? does it use a glue? suction?

When I had my screen replaced the gell was poured in to the housing and left to set while the screen was out , the housing was then attached to the screen , the fitter had a jig that held the housing level while the gell set