dave, if your foam core is still intact, fill a bucket with hot water and fairy liquid and steep it for a while, rub it and try to remove as much crap off it , let it dry upside down then refit it. if thats your only problem with it the fiary will break down the oils.
Mine's got half the A1 attached to it at the moment. If I thought Fairy would remove excess RamAir polymer then I'd give it a go. I just don't want to pay for yet another MAF ( #8)
hands that do dishes................
mild green......................
I was about nine years old before I realised 'dudicious' wasn't a verb in the English language.