Does anyone have any issues regarding the plastics on and around the front heater vents? My 22 plate Monte seems to have discoloured and gone matt instead of gloss. I've never cleaned with any liquids or solvents, only wiped down with microfiber cloth.

Unfortunately not, I've had two Mk4's since June '22 and none have mine have gone this way.

 

I even get my car valeted so who knows what chemicals they use on mine.

 

Could be worth speaking to your local dealer? Potentially a warranty claim?

I saw this thread and picture before getting my own fabia and honestly thought it just needed a thorough cleaning. But now I have my doubts, because I am already experiencing something similar that I cannot just dust or rub off. I have not used anything else either inside the car than a dry microfiber cloth for the screen. It's approximately 2 months old.

I first noticed some spots on the black shiny flat plastic part around the storage hole under the radio and white dust particles around the gearing stick, and then I saw the air vent decor was even worse. I have no idea why it looks like that, and only on one side.....so far....

I would guess it's due to the heat from the vents?