Idle is low and tends to vibrate the car,would this be due to a dirty IAC valve?

Engine idle speed specification is 650-750 rpm, after at operating temp. improper cleaning of throttle body and idle air control valve openings can cause damage if done improperly, or with the wrong spray. The I.A.C. is located on throttle body. Rough idle could be due to weakened/damaged motor mounts. Would not recommend undertaking this service without the proper tools/knowledge/materials.