Question about MAF Sensor and Intake Air Temp. Sensor

[mat_man1]

I have had a bad O2 sensor for a while and the SES light has been on. Recently my fuel mileage dropped significantly even from the poor mileage I was getting with the bad O2. I checked my codes this morning and it gave me one for intake air temp sensor and one for the MAF sensor as well as the Bank 1 O2 sensor. My question is whether it is posible to clean the IAT and MAF or if once they set a code that they are DOA (need to get new ones?) I have read about cleaning the MAF very gently and carefully but have not really seen anything about the IAT. Also I know the MAF will affect gas mileage but what about the IAT? Any help is greatly appreciated.

Matt