I have a 2008 4Runner. it's up to 60,000 and it's time to do some maintenance. I replaced the engine and cabin air filters at 30,000 with ones from K&N.

My engine air filter is looking a bit dirty and I'd like to clean it. I've never cleaned an engine air filter before. It says on the K&N website that all of their air filters are washable. Info here: K&N Air Filter Facts You Should Know

My question is this. How important is it to use the K&N Recharger Kit for cleaning their air filters? Info here: http://www.autoanything.com/air-filt...A1993A0A0.aspx

I'm guessing dish soap detergent might damage the material? It says you have to oil the filter on the K&N website. I know nothing about air filters or cleaning them but would like to learn as it seems easy enough. Can someone give the quick run down?

Thanks.