I've maintained the air control selector of K12 mi

My Micra is a bit old, so I felt the air nozzle selector dial rotation had become heavy

I worry about the spindle locking of the flap in the HVAC, so I checked it

I removed the cluster C and checked the movement of the selector dial
I lubed the slide unit with silicone oil

All linck and door spindles are no problem
This is the main link ( left round shape)of the flap door, I also lube it