I had my car valeted 4 weeks ago and the valeter somehow managed to get some dash cleaner inside the MMI display screen; now it's just a series of coloured lines, but does change/respond when you use the controls. You can actually see the liquid behind the screen because when you wipe it, you create visible streaks behind the screen. I hoped it would dry out but no sign of any improvement. Nobody seems to be able to help with this - Audi have quoted me £572+VAT PLUS FITTING to replace the screen entirely, but in my view shouldn't the unit be sealed anyway so something like cleaning the dash shouldn't affect it's operation? Any suggestions, or do I just have to take it to Audi and pay whatever bill they charge?