1964 Plymouth Barracuda headlight knob won't pull out from dash

Shoot a little WD up into the hole. Let it set for awhile then try again.
Headlight switch is replaced. But still NO headlights. I now have parking lights and at least some dash lights but neither regular or high beams on the headlights. I directly wired headlights to the battery and they come on both low and high. I have cleaned all the gang couplings under the dash and at the fire wall. I have also checked fuses and checked for continuity. Any other suggestions? Fuel gauge is also not working with a new sender unit in gas tank - but I don't know if that is related it it hasn't worked for a while but I blamed it on the sender unit. Guess not.