Started using cartos on my Grand and all you read about cartos was to keep them wet the wetter the better. Well I did that and found that the carto gave lousy vapor and flavor. I used condom method to fill and topped off every time I used it. Well what I was doing was continually flooding the carto. When I stopped topping off with every use and squonked like I did with atty the carto worked to perfection. The actual atty is at bottom of carto and with bottom feeding device that's the part that had to be kept wet so I just squonked as usual, no more flooding vapor and taste just great. If anyone has had similar problems with cartos this may help.