I think that's life with any carto I have even used mn-puffer, that's why I say if you get a good clean, let dry and get a second run your way ahead of the game. I never even use to bother with cleaning and would just trash them but now with these big Echo cartos it just may be worth getting that 2nd run out of them. Carto's are a disposable like most of the stuff in this industry still cheaper though and you get way more time from the stuff than a pack of smokes in my opinion.