So I purchased a Joye 510 a few weeks ago and recently started using it, was waiting for some juice to come in the mail, for the first couple of hits when I smoke it the vapor taste grate and is not harsh at all. But after about the third hit it gets real harsh and lacks flavor. At first I thought that I might not put enough liquid into the cart but when I checked it it was still pretty full. I even switched atty's and still the same thing. The first time I used the second atty it worked great but after that the same thing happened. Am I doing something wrong or is there a chance that I got a bad batch of atty's?