Had my motorhome just 2 days and at the back i have an external locker, which is under the back l shaped seaten area/ double bed. Noticed that the drop part of the locker behind a covering the wood is all damp. I have been out tonight with 2 hairdryers trying to dry it out, it worked because water was driping out. I have bought some translucent silicone and filled in the gaps. will this work ? Anybody elsee suffered this problem ?