I had that problem on our Skylark door. If you look closely, there should be a little clip on the ball socket that you can pop loose to remove the ball that is attached to your frame or door. Once you have one end of the gas spring loose you can rotate the gas spring to tighten it back where it belongs. I put some blue loctite on mine and it hasn't come loose in over two years.
The clip is shown in the attached photo, it is that little strap that sticks up above the surface of the ball end.