I bought 3 packs of these with my first order and when I first filled them they rocked! A whole lot less leaking than the clear ones I had before, so that is a plus. I am still using my first box and am noticing that they don't seem to be working as well. I probably fill them once a day. I try to keep them full just cause I can't see how much is in there. I have also heard about wick fluffing? What is that? I have rolled them around and tipped them up to get the juice to the wick, but it doesn't seem to be working. They start out with a good hit, then it starts to taste like metal. Any help would be great. These will be expensive if they are only one use then throwaway. I am diggin my xoxo juice as well, gotta get more soon, thanks!