On my way to work today my audi decided it didn't want Demist the windows. Getting worse and worse as i drove regardless of temperature or fan speed or direction. The whole climate control fan speed seems slow and underpowered normally one press of the windscreen Demist button clears it and is normally powerful. I have noticed over the last 6 months or so upon startup with climate control still on...outside from engine it'd make a loud screeching noise. Possible related? Belts? No idea help! Also I have no vagcom ATM maybe pollen?