Cleaning a K&n filter with home products?

I have never tired it, but now I want to badly! I just looked it up, and club soda is listed as a good natural cleaner. Adding a heavy detergent to it makes sense. Plus, even though the writer just about wrote a book about the subject, why would they lie? They aren't an Oxy or genric club soda salesman. I'm saving this on my desktop and trying it the next time I clean the element on my DRZ. I have an extra one anyway. I looked around and several sites talked about using Oxyclean for filters. I can't see adding club soda hurting anything.