I have read somewhere on a review of the earlier models of the APEX Nano
that the water is actucally coming from the wheel well when slide is closed and driving in the rain. The cure was to now have wheel well liners installed on the newer models.
I have been looking at the Apex Nanos for about a month now and on the 2021 models there is a metal wheel well liner installed. This dealer had a used 2019 Apex of the same model I have been looking at and it has no wheel well liner and I can see that could be a issue.
Long story short, I asked dealer about this and they had no issues from previous buyers, so they say. Anyway, I bit the bullit and bought the Apex Nano 191RBS and picked it up yesterday. This is an issue I well be watching closely. Good Luck with the leak.
2021 Apex Nano 191RBS OFF GRID
2017 Chevy Colorado Z71 4x4 3.6 L