How to clean AEM Dryflow Filter?

Hey guys I custom made my own CAI for my 4 banger a while ago and you can see it in the pic below. My question is, how often does the filter on a CAI like this need to be cleaned? I think I have about 6,000 miles on it right now and have never cleaned it. Also, this filter is an AEM Dryflow and you can't oil it. AEM makes a kit of solution to clean the dryflow filter, but I dont think its necessary to clean the little filter on my getto intake. It seems you put the solution in a bucket of water and dip the filter in the bucket and shake it around. Then I'm sure you have to let it dry out a while. Im just wondering if there is some other solution anyone else has used.