After cleaning my Mass airflow, my car is overheating and having a very High rpm...over 3500rpm in park. What can be wrong?

Cleaning a mass air flow sensor is not a recommended activity, and does not necessarily yield positive results. What was the purpose of cleaning it? What testing was performed suggesting that it was not reading properly? What data did you record with a diagnostic tool capable of analyzing data? Sensors that affect engine fuel and air mixtures will not affect engine temperatures. This is a different situation altogether and requires different hands on testing.