The first time I used it, it worked pretty well. After that, not so good. I clean it out after each use, but it gets harder and harder to draw through. I've taken the mouthpiece apart and soaked it in alcohol as recommended in the instructions and that works for 1 or 2 times then I have to take it apart and soak it again. I bought a grinder to grind the herb, but I guess it's too moist because there is quite a bit unburned, especially when I pack it firmly as the instructions say. All in all I t...