Is your middle sun visor as squeaky as mine due to lake of use? This top tip may help. Get some furniture polish, I prefer Mr Sheen original but any will work. I played it safe and removed the entire visor from the roof and sprayed the plastic join(the bit that rotates when opening / closing) Absolutely cake the plastic with the polish and open and close the visor. A small flat head screw driver is needed to open the cover and a cross head to undo the one mounting screw. I found I can get more polish in the gaps in my hand. It also prevents getting polish on the ceiling which will attract dirt. I also did the drivers and passengers while at it but made sure I hand a clean cloth to catch any surplus spray. All moving freely, quiet and literally a 5 minute job.