Hi. I have a 1.8ES 2009 which has the electric blinds for the roof and just before christmas when it was really cold I tried to open them, unfortunately only the back one slid open then all of a sudden the front one shot open in one rapid movement. Now it seems to work intermittently. The back one is fine the front sometimes sticks and then shoots open. I have tried WD40 on the runners without much success. Any ideas or is it a job for the dealer?