Hey GrassCity, I was talking to my friend and he was talking shit about me using my metal screens. He says the the smoke that comes off of it is harmful. He says that the brass screens are better, is that true? I've also tryed to use glass screens like the jax and star but they get to dirty after like 3 bowls, and i smoke like 10 bowls a day so i can't have that. I've also picked up these round glass filters at my lhs. They start out white but after a bowl or two it just looks like a little resin block. It works nice but also clogs up to fast. I can't stand seeing little green bits in my bong water so thats why i have to bloac the hole on my slides. What do you use if any?