20 foot awning

If it is an A&E there are springs on both ends of the awning tube. The end with the extend/retract lever can be tightened by removing the nut/bolt holding it to the arm. Once you have the bolt removed, a second person is recommended to hold the tube while you use a pair of vice grips to wind the spring tighter. You must attach the vice grips, then move the lever to retract, while holding on to the grips. If it skips, the spring is probably broken. the left side is a little different, as it will want to unwind as soon as you remove it from the arm. There should be a hole in the shaft or through the end cap to insert a large cotter pin or nail, or welding rod, to hold the spring from unwinding when you remove it from the arm. You can wind it the same as the right end with vice grips. Just don't overdo it. This can be dangerous, so use caution. At least 2 people should be there is you have not done this before. If you are not sure, call a pro that does mobile work to help.