Joe Russell wrote on Friday, February 27, 2009 - 01:58 pm:You can put stuff like Isopropel alcohol through and it with be fine, it's a very good cleaner.
Don't sniff it though
AFM's work by measuring static air temperature and comparing it to the temperature of the flowing air (using the fine metal grid Dave mentioned) to get an airspeed without impeding it's flow too much, so cleaning the metal grid and temp sensor with an evaporating type alcohol will likely improve the accuracy of it(only if it's dirty obviously, which it will be).
Remember to be gentle