You can also add to remove a couple screws from under the slide outs to look for water damage. Rusty screws are a clue. This is what I found after getting home with my 2016 Jayco. All 3 slides. Luckily La Mesa had a 20 day warranty period which I was able to use for repairs. The leak was coming from what they call the picture frame molding on the slide. Recaulked all the joints and good to go. As the slide goes in the rubber seals put pressure on the joint loosening it over time. Added to yearly maintenance. You can see where someone tried to add caulk underneath to fix it. That just sealed the water in.
2016 Jayco Precept 31 UL