There is a great way to find info like this. At the top of this page is a "Search ECF with Google" box. Type in
"cleaning cartos" or whatever info you're looking for and it will give you all threads where this is discussed. You will find lots of info faster by using the search tool. Great question though, yes clean them, save money, be green. I use the rinse, blow, soak, rinse, blow, dry in oven 1 hr. at 200 degrees or find a sunny place to let them get totally dry.