Isopropyl alcohol is said to work. Back when we were all on Tyresmoke forums we used to fill a zip bag with some Isopropyl, dip just the MAF element in it overnight, let it dry out for a few hours. I don't know how much that helped.
Ideally I would want to scrub the metal element with a tiny glass fibre brush to remove any surface oxidation/deposits, but there is not much room to get in there.
Of course if some other part of the MAF fails then the above is not going to help.
|