Water in roof sky over driver’s door and in B-pillar

Hi @ all! Man-o-man!!! Now it’s going on… After a long rain I wondered why my belt was wet. Thought at first I would have let it hang outside, but it wasn’t the case, but it was nicely rolled up. Then I found out that the roof sky was moistened directly above the driver’s door. I bent the rubber a little bit and there was water in it – is not sooo good Especially I don’t want to breed a rust! Has anyone ever had this before? Are there simple tricks to get the seal over the driver’s door tightly, or is there only a new seal from the workshop? I can’t imagine that it’s something else than the seal, but let me learn better. With best thanks for your tips!!! Mediciman