check the windscreen seal. been a problem for a member in the past. You may need to have a new windscreen installed to solve the problem. This cured it with this member
Also put some talcum powder around the seals then try a hose, perhaps identify where its coming from. Door windscreen first then try the door seals. It is worth solving this as you coulld end up with water in the BCM board. You dont want that. Very expensive