MK4 2021 Octavia RS back climate control rattle/buzz noise

Hello everyone!

I am long time lurker, this is my first post. I own a 2021 MK4 Skoda Octavia RS and I love it, but some things are annoying my autistic brain, mainly - rattles and interior random noises XD

But ok, I managed to identify main culprits and solve the issues to somewhat satisfactory extend, but one kept on bugging me, until my buddy finally identified the culprit: the back seats vent controls. At higher speeds on highways (which are fairly good in Croatia, regarding the surface quality) this thing produces a high pitched rattle/buzzing noise, it is kinda hard to describe it, but imagine having a coin on a metal surface that is vibrating at high frequency. So he identified it and moved it and then it stopped. Then I tried it the next day and it worked, but I can't find a permanent solution, so I am asking you if anyone has any ideas?

I do have felt tape, silicone spray and white grease spray (lithium grease), should I perhaps first try with small amounts of grease on the plastic joints and contact areas?

Thanks,