I have found that you shouldn't put more than 6-8 drops in a cart. When I started I would fill the cart untill it looked soggy. This led to my eating the juice which is nasty and it would come out the other end where the atty connects to the battery. Also when a cart is that full it seems like the atty can't work properly. It cant atomize the liquid because there is to much juice. I tell you there isn't much worse than pitiful hits and eating the juice. So I followed the instructions I found on several videos and less is most certainly more with vapeing. Now I get big plumes I haven't eaten any juice in quite some time. Life is good. So if you are having problems here is what I do. I start with a freshly cleaned cart (i use hot tap water and a q-tip) I install pillow stuffing other wise know as poly fill (there are plenty videos on line to show you how to do this) then I put about 8 drops of juice in the cart and one or two in the atty. I vape like that until the vapor starts to get weak and then I only put two more drops in the cart and maybe one in the atty. Use this cart until it starts to shrink away from the atty. If your batting doesn't touch the atty properly then you will begin to get the burnt taste. When this happens you know that its time to clean your cart and put some fresh batting.The way to know if you have the proper amount of juice is if your batting looks almost dry. Not sopping wet. I hope this helps some one. Eating juice isn't any fun.