No not in the channel. But I think the water may have leaked down the channel, onto the floor. I had rusty floors like you as well. But ever since I took the cab weatherstripping off, silicones around all the little holes, and put the weatherstripping back in place over the silicone, no more wet floor. But that was just my case. Thought I’d share it with you incase you were still leaking some water and couldn’t figure it out.