I wouldnt clean a carto if you dont have to. Some cartos dont work as well after they have been cleaned. If its already clogged up and you want to try to clean it to get alittle more use out of it, go for it. At least then if the cleaning doesnt help much it was already clogged and you were going to throw it out anyway.
If you use a carto correctly and always fill it correctly, you can easily get your moneys worth and never clean one.
Like I said I normally get 2-4 weeks out of one, without cleaning them. I figure even if I get 10 days out of one thats still def getting your moneys worth. If you compare it to cigs, even a week is getting your moneys worth.
Think about it. One week would be about .20cents a day. Alot of people smoked a pack a day or more when they smoked cigs. Thats avg 6-10 bucks per DAY.
A pack of cartos is about the same price as a pack of cigs, so if one carto lasts a week, youll still get over a month out of one pack of cartos. $6-10 for a pack of cartos per MONTH is A LOT less than $6-10 for a pack of cigs per DAY.
If you think about it that way, youll realize that your well getting your moneys worth, even without cleaning them.