Having had the Mass air (I mean the sensor OUT of the unit) apart a zillion times (smoothing out and enlarging the bore on a spare one)I can say TB cleaner or brake cleaner (non clorinated) will clean the Mass air. Be careful spraying it straight into the small opening for the sensor. The sensor is suspended on two tnin but strong wires and is a coated wire. It can take a bit of pressure and not collapse, but be careful.
