The belt sometimes sometimes does not retract with automatic winding. The space between the belt and the guide is not so great. Usually happens whent the belt guide is dirty. With the help of a piece of sandpaper you will be able to fix the automatic movement.
Take a piece of fine sandpaper and scissors.
Pull out the belt.
Cut a piece of sandpaper with the same width of the belt.
Put the piece of sandpaper under the belt with the rough side down and slide it between the belt and the belt guide.
|Hold the piece of sandpaper tight together with the belt and move it a few times back and forward until it moves smoothly. Remove the piece of sandpaper and test the belt movement. If it's stil not going well, repeat the procedure.|