Glass sliding roof 9-3 Coupe MY98 Water in the trunk

The trunk of my car is always damp, when it is used some time not. It has a glass sliding roof. I suspect that part of the water comes from the rear drains …that speaks for it, that in the back window after the laundry water traces are present. My question is now, whether I can only check and clean the hoses that go from the sliding roof to the rear in the wheel box, if I dismantle the roof sky? An unwise phenomenon is anyway, w he water can get into the bead of the emergency bike ?? Can anyone say anything about it ? Gruss Artarun