Thought I'd throw in my own 2 cents, BAVBMW is right on about the drying and oiling. If you end up with oil on the MAF, you will soon get to buy a new one.

My general point when someone asks me about K&N filters is to ask them how diligent they are about maintenance. If you're not serious about it, then you could actually damage your car, not just the MAF. You do have to regularly clean it, let it dry, and then oil it, and let the oil naturally dry. Otherwise you don't get any filtration benefit and may actually suffer a detriment.

While the two K&N setup is a nice trick, since the K&N's are so pricey, I have a stock air filter I throw in when I get ready to clean mine. Then I don't have to be in a rush to get it dry, etc. and I can let the oil naturally absorb as well. I don't drive much during the week, so I usually start the process on a Monday evening, let the K&N air dry until Wed evening, then oil it, reinstall Friday evening for the weekend.

I've used the K&N cleaner but had just as good a luck with Dawn. Unfortunately the Dawn is lots harder to rinse out, just keeps sudsing forever. But I do like the nice red ring in the sink.

Take care and enjoy the ride,
Greg