OK--bees wax is one of several lubs that will help the windows slide without messing up the windows--eg, like when it rains. Have noticed that several of the tracks are in pieces but have not seen them ride up on one another--the bees wax may help with that. Larger problem with some windows is that the sealant used to sandwich the windows isnt always trimmed so it sags and catches the tracks--bees wax helps but this is hard to fix without taking the window frames apart. Second issue is that the frames also sag over time or they didnt leave enough travel space for the windows when they were made. Again, these are hard to fix, but bee wax does help.
2003 40' MDTS
Garden Ridge, Texas