When we went out for our maiden trip we used our shower 3 times before we saw water dripping under the trailer. When i opened the access panel on front of the shower I found that the shower pan had never been connected to the the trap pipe. All the water that didn't "hit" the trap went into the insulation under the trailer. I fixed the drain,opened up the bottom of the trailer, pulled out wet insulation and carried it back to my dealer after our trip. Dealership owner got a very big ear full and then the service department got a bigger one. Check ALL of your drains. We got new insulation and chloroplast enclosure.