So if the Carto seems bad, you want to satisfy your curiosity and try something new here is an idea I read about this in the Mod forums and tried it out, it works pretty well so far.
Gently rip out the filling from the Carto, making sure not to damage the center wick and atomizer coil. While ripping out the filler you will be able to see if there are any burnt spots of anything odd that might be influencing the taste. If there is you might as well let us know, I would be interested anyways
With this filler out you can now drip
juice down the sides of the carto, dont use too much! You want just enough to pool at the bottom so that the center wick absorbs the juice, not so much that it bubbles out while you are smoking (Learned this the hard way). If the wick is already wet then it will not hold very much as is.
This makes the juice taste different, a little better, in my experience. Hey maybe its just me being crazy, but I thought it was pretty neat. I am now using this to test out new juices that I get.
Thought I would mention that this will not hold near the same amount of juice, but it is probably the closest to dripping that we can do on a KR808. Granted I've never dripped or anything, so maybe I am completely wrong.
