i purchased a used aem cai and it's pretty dirty, inside and out. the filter it came with was dirty and pretty bent out of shape, so i will most likely purchase an aem dry flow replacement filter. but what can i use to clean the tubing? the inside has dirt, so what would you recommend i clean the inside with? as for the outside, it's got scratches and basically signs of wear, but looks like it could use some cleaning...any recommendations on that? any helpful advice would be greatly appreciated. thank you!