Old radio
The volume knob crackled. Contact cleaner fixed it in a minute, after an hour of opening the case.
Workbench notes
Door that sticks
Planed a few millimeters off the bottom edge. Painted it again so the bare wood does not swell.
Lamp cord
Replaced the frayed cord with a new one and a proper strain relief. It was safer than it looked, but not by much.