I agree that cartos just arnt worth trying to clean. Some cartos do not take a cleaning very well and don't work well after. If you always fill them properly, use them right, and don't let them get dry, you can def get your money's worth without ever even trying to clean one. My record is just shy of 7 weeks with one carto and i never tried to clean it once. It was still working fine when i switched to a new one and still had decent airflow, i just got bored with it and started itchin for the taste of a fresh carto bc that one wouldnt die so i switched to a new one. I use the Ressurector cartos and use a syringe to fill them. I get on avg 1-3 weeks for a carto depending on the juice that's in it. Juices with sediments in them will clog a carto faster than anything, but even with them you can still get your money's worth. I vape a coffee juice that I love and even though it has sediments I still get a week or so with one carto and never clean them. I figure if you can can about a week with one carto, your without a doubt getting your money's worth for how cheap they are. All you have to do is compare it to cigs and it's a no-brainer. A pack of cartos is about the cost of one pack of cigs. If you get one week out of a carto, that means a 5-pack will last 5 weeks. When you smokes cigs, if you smoked a pack a day, you spent the amount of money for 5 weeks worth of cartos, every single day. So is it really worth trying to clean them?