Lol man make sure that hole is not too big and not too small, that's how you get best hit. I dunno exactly how to explain it but just get a pencil or poke a hole in it and open it up more with a pencil. The hole it puts in it should be big enough. I don't know if I'm right but the faster the water drains (but obviously not too fast) the more smoke is pulled in. I dunno it seems to milk way more when I changed the hole and I got fux'd up xD.