Well, if you are still under warranty I would not hesitate, have it replaced. If you have the same window on the other end of your slide, have that replaced also, as it may only be a matter of time. The first time mine came out I thought I could just push it back in, but after about 3 times opening the slide it came back out. The window on the other end of my slide had just a small gap in one corner, and I told the dealer it was also coming loose (even though it never got worse), so they replaced that one too. They also told me that there were some defective seals in some of the windows, but the technician that was replacing mine said the new seal looked just like the old one, but once they come out they stretch and will not stay seated properly.