With black windows, sometimes it's tough to tell where the water comes in. If you want to pinpoint where it's leaking, put small strips of news paper every couple inches. Find the highest point where it's getting wet and that's where it's coming in. On the crank-outs, the most likely place for a leak is at the top where the hinge is. That's where ours leak and I think the factory weatherstripping just doesn't go high enough to make a good seal.
We've got a 2008 Windjammer and if it's your crank-out windows and they're Kinro's you probably have the same issue we do. All of our crank windows were leaking at delivery. We fixed 2 by opening the window and going outside to lay the rubber seal correctly (it was all wrinkled and bound up). The others had to have the seals replaced. We just had our dealer order them direct from forest river and they sent us 30 or 40 feet that we can cut\fit ourselves. We just got the seals this week so I haven't tackled replacement yet.
Ryan & Cortney
2012 Windjammer 3008w