I am the 2nd owner of a 2010 M21 Previous to me owning the original owner kept it under a shed on his farm. Here at my house it sits in the driveway in Texas. Last time we went camping, my wife mentioned the floor was kinda "squishy" right by her corner of the bed ( the corner that is adjacent to the corner of the sofa) and I should check it out. This is on the drivers side of the camper the side the slide out is on. We got a decent rain couple weeks ago and so I went in and pulled up the linoleum there. It is wet, moldy and looks to be all along that wall by the bed about a foot in. Also looks like the rot runs partially under the jack knive sofa. I cannot really see anywhere obvious where it leaked in except perhaps the lower right corner of the wall where the slide-out is. Looks like the contact paper there may have seen some drippage. About a month ago I took off the exterior wheel well coverings and caulked them as per another post I seen about that being a source to leak. But it rained since then and so I know it is probably not from that area. Is it common for these to leak around the slide out? I looked at all the rubber seams and they look normal to me. I checked the roof and also looked underneath, all looks ok HELP!