The plastic bushings in the actuator mechanism have turned to dust.
Time to remove the headlight unit and replace the bushing.
It's not particularly difficult, but expect to spend a couple of hours.
The bushings are over the counter at your local parts store, cost you a couple of bucks.
Here's a YouTube video on the repair:
https://video.search.yahoo.com/searc...d72587047347b1
If you were local, I'd offer to help for the price of six pack and good company.
'Crabs