[bshgto]

Have same camper, live in the northeast, we have had constant cloudy rainy days off and on for months with occasional sun shine this year. I checked mine and no sagging from water build up. Maybe just condensation build up or the seam at the bottom and wall intersection leaking that I have read more than once was causing a water problem and eventually rotted floor. Remember the other kitchen slides are much lower than the others heat will rise, guess I will start checking mine more than often now. Or since you have the A/c on all the time the floor inside and outside will be cooler than the air temps and it builds condensation with no air movement cause of the plastic cover? Would be nice to know the outcome of this.