The previous reviewer had the drip problem. I had same problem when I first got it. Then, I realized that is probably caused by air trapped in the system. I put the tip in the up position, set switch to hi. Let it sit for a few minutes. Then, push the trigger to let some glue out (collect the glue with a paper towel. I can hear the air came out with the glue. After that, there is absolute no drip.
I think the manual can be improved. It should mention how to remove the air when first time use. There also should be an explanation on when to use hi or low position.
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