Common causes:
(1) Sticky drill pay attention to the amount of glue, too little sticky is not firm, too much glue is easy to accumulate at the bottom of the drill, and the time to wait for drying should be extended accordingly;
(2) There is no hemming, after gluing, we can take the wash-free sealing layer around the bottom of the diamond decoration around a circle for the hemming to make it more firm.
Note: The surface of the drill should not be stained with glue or glue! Otherwise it won't light up!
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