I'll begin by saying that I have only seen positive reviews and videos of the Miqro-c. This is why I chose to purchase one. I am coming from a Healthy Rips Fury2. Works great, but the reviews of the Miqro-c piqued my interest. Well, I can't pull any air through the vapor path when the oven door is closed. It seals completely, and I see no provision for air holes. Is mine defective? With no flower in the oven, I can see all the way through the vapor path, and air flows freely. Are you supposed to pack it so full that the pearl rests upon the flower, holding the oven door open a little for air flow? Am I using this incorrectly? I'm 50 years old, and have been toking since age 15. I'm not new to vaporizers. I am aware that I could be overlooking a simple cause, but I cannot find one. Based on this experience, I would not purchase another DaVinci product, or recommend them to anyone. Hopefully I'm just doing something wrong, and I will edit my review. In the meantime, this thing doesn't do anything except get extremely hot. No vapor, because no air flow. Meanwhile, my Healthy Rips produces clouds. My experience does not seem typical as stated in the beginning of this review, so I assume most people are very pleased. Hopefully someone else will chime in and show me my error. Take care, God bless!