Well as I'm not psychic I don't know what you have Timmy but to clean the one I had on my Octavia I used Oxy clean and a bucket of hot water.
Dunk the filter in the hot water, sprinkle with oxy clean, let it fowm up then rinse again. Dry thoroughly and then spray (if oiled) very lightly and leave wrapped up on a radiator for an hour or so.