Get the K&N filter kit. I clean mine about 1 time a year.
First soak it with the spray cleaner that is in the kit, let soak about 15 min.
then rinse with warm water from the inside out ( oposite of the air flow )
low pressure of course. You will see a lot of dirt coming out. Once you
have rinsed it good shake out most of the water, and let air dry in the sun
for at least 1 or 2 hours. Then spray on the new oil as directed and again
let dry 1 or 2 hours before install, then you wont get any oil on the MAF.