I have washed out G6 cartos, they work great for trying new flavors so not to mess up a new blank. I wash them with a cleaned out dish soap bottle with the squeeze top, just sqeeze the water thru the top and end of carto until they smell fresh. Shake out water, blow thru it & I leave mine dry for at least 3 days, I blow out the ends daily to help with drying. I may get another week or so out of them, then I toss them. bnrk