Carriage Cameo

I have a 2009 carriage cameo 36fws. I have had three double pane windows replaced under warranty which have again failed. I had a couple replaced (resealed by a local window repair place) which have also failed. From everything I have read they are **** windows and about all I can do is to convert them to singe pane windows (we don' rv in cold of winter). l would like some other people's opinion on this and their results and how they performed it.