First, one has to open up the radio. There were two screws on the top back of the case, one inside the battery compartment and two sneaking away under the rubber feet on the bottom of the case:
|Screws indicated by the helpful arrows on the case|
|Screw hiding under a rubber foot pad|
Next, a small plastic cover over the volume control had to be removed to reveal the potentiometer. A small spray of electrical contact cleaner followed by exercising the potentiometer back and forth to work the cleaner over the dirty metal contact surface is enough to do the job.
|Cleaning the contacts of the potentiometer does the trick|