Grinding machine use
First, the position of the middle of the nail surface is polished with the abdomen of the sanding head. The two sides can be adjusted to a slightly thinner tooth to be polished, and the edge position can be polished with its head.
When grinding, don't polish more than three times in the same place, otherwise it will be a bit hot, and we only need to knock out the color glue. The rest of the glue, we can directly use the sponge to frustrate a few times. This will not hurt the nails.