I bought 2 new vaporizers the crafty, and the davinci iq. I have been having trouble getting getting a lot of hits. At first I thought it was the davinci, but then I tried the crafty and I got the same results. I only get 3-4 hits off both of them. I never had this problem before I have been vaping for 2 years. I recently switched from vaping medical marijuana to vaping home grown that I get from a friend. Could that be the reason why I get a little bit of hits?