Little tutorial how to clean bmw m3 e36 mass airflow sensor. You can also use this diy tutorial for other cars. Cleaning maf sensor can resolve idle problem and can lower gas consumption for 15%. Mass sensors No1 killer is oiled type air filter like K&N and similar.

You can use break cleaner with excellent result and you can buy it everywhere!!! Yesterday I use it and my sensor looks like new. Spray sensor several times from different sides. After last immediately blow from mounth to dry it up.
Dont use carb cleaner because he can contains lubrication aditives and can destroy plastic. Aditives can leave deposit on sensor.