How do I clean the MAF on my 2000 toyota corolla?

You first remove the wiring connector, and then remove the 2 screws that holds the MAF in place. Remove the MAF, and, with a flashlight, look down into the bottom of the sensor. You will see 2 small silver wires, and a little bulb. The MAF part is the 2 wires. The intake air temperature sensor is the samll 'bulb'. Look to see if the 2 wires are fuxxy, or otherwise dirty. If so: using a can of commonly obtained "brake cleaner" (find this product at any auto parts store), spray the interior of the MAF until the 2 silver wires are clean. Please do NOT use compressed air to clean the MAF, the air pressure can and will brake the wires, and that will render the MAF inoperative. After it is cleaned, let it air-dry, and then replace it and reconnect it. Drive the vehicle for a few miles for the computer to see the new values.