I just recently go a new DBV, its pretty awesome by the way. I am having some problems with it. I think at first the screen got moved and was not sealed at the bottom of the bowl.I had to put the temp way up to just get it to go. The screen is in correctly again. When i used the new grape ape i got it seems like i cant get all the weed to turn to that dark brownies color. I was using blockhead before and it seemed to burn a little better. The grape ape smokes fine in other pieces. I have put it through the bong and smoked it out of a pipe. I cant seem to figure out why i cant get the whole bowl to go brown. I would say it 85% brown and 15% greenish. I take a few hits then press on the weed and stir, then repeat.