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  1. narrowsparrow

    Grenco Science - G Pen Pro Herbal Vaporizer

    Well, after having purchased one of these about 6 months ago and then having Grenco send me the wrong accessories for it FIVE times, I decided I was done with them. They tried to explain that they were "updating" the product (MicroG), but they sent me the wrong tanks three times, the wrong...
  2. narrowsparrow

    Grenco Science - G Pen Pro Herbal Vaporizer

    I ordered two new mouthpieces & two new tanks. When they arrived, they seemed to fit a bit differently, but undeterred, I loaded up & tried a draw. Nothing. The unit was heating up, the blue light was on, but no pull allowed. So, I emailed them. No answer after after three days. Then I called...
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