Just got a Brinkmann gas cabinet smoker. Works really well, and is much less work than my charcoal smoker. Anyhow I bought some pellets to use in the gas smoker, I was told you can use them even if you don't have a pellet smoker. Problem is my smoker has started to "leak" out the top and build up some sort of sticky black residue under the water pan. Not sure what it is, when it's hot it is really gooey and sticky, but when cooled it's almost hard as a rock. Should I only be putting these in the foil pouch to smoke with? I sure hope I'm not ingesting anything harmful