I occasionally clean the dual coil cartos for my Mom because she goes through cartos like tissues. She's very rough with cartos- filling and using them. Her cartos look like they've been through the wars. Sometimes I have a little luck cleaning and reassembling the clear dcc because it's so easy to do with them. I'd say about 1/2 the time they work properly the other 1/2 you waste juice. It could be because she's so hard on them I do it in a pinch because I can't buy them fast enough. Hay, she's not smoking so I'm happy.