Complete speculation here. But......
The awning just unrolls. So is the fabric rolled unevenly?
Or do you see any binding or uneven movements in the arms?
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The TT: 2021 Jay Flight 28BHS
Ramón: 2020 RAM 1500 Laramie
Bought our first Travel Trailer at age 51. Shouldn't have waited so long!
Lubricate where the arm slides in the channel. The channel is the hardware attached to the side of the rig. I had the same problem and silicon lubricant took care of it.