Try using wd40 on them
You can clean your car's sun visor by going to a near automobile repair shop. In addition, you can carefully clean your own car's sun visor by rubbing and washing with a hose.
The sun visor.
A visor.
you should use a visor when its sunny out, the sun is in your eyes, or your face is sunburned.
http://www.oempartsguys.com/blog/how-to-find-your-replacement-sun-visor/
Henry's first vehicle was called the Quadricycle and it didn't have a sun visor.
Sun Visor
Remove the sun visor retaining screws. The sun visor will slide off of the sun visor rod. Lubricate the sun visor rod. Put the sun visor back on.
You can remove the sun visor on your Toyota Rav4 by removing the screws on the swivel arm. When they screws are remove the visor should come off.
http://www.oempartsguys.com/blog/how-to-find-your-replacement-sun-visor/
The wires on the sun visor are for a lighted vanity mirror.
I just removed my 2003 Honda Accord sun visor clip today. You have to rotate it 90 degrees and it will pull right out. It is quite difficult to rotate it, but once you get it rotated, it should come out easily. The plastic clip attaches to metal, so don't worry about breaking the part of the part of the car the visor clip connects to.