When you take your first hit from a dry herb vaporizer that works from convection you will get a small hit the first time. This is due to the fact that the herb needs to get to around 400 if not 430 degrees in order to have the oil vaporizer from the herbs. When you take your first hit the herb is at room temperature and must be raised from around 80 all the way up to 400. After your first hit your herb might be around 300 so it reaches it vaping temperature much sooner. If you take a break and let your herb cool down to room temperature you will get a smaller hit when you go to vape again. Again, your next hit will be larger. Always remember this up and down is standard for a whip style vaporizer and you will usually run your vaporizer at a slightly higher temperature than when you fill a bag. Always turn your unit down in temperature if you are going from a whip to a bag.