Nail polish leaks when placed on one side. Is it a problem with the bottle design?

After use, be sure to tighten the bottle cap and keep the bottle mouth clean to effectively avoid leakage.
1 The bottle cap is not tightened
If the bottle cap is not tightened, air can easily enter, and the nail polish will leak out of the bottle mouth due to solvent evaporation and gravity. Please tighten the bottle cap after each use to avoid leakage.
2 There is nail polish residue on the bottle mouth
If there is excess nail polish residue on the bottle mouth and brush head during use, it is easy to flow out along the bottle mouth when it is tilted or shaken. It is recommended to wipe the bottle mouth with a paper towel after each use to keep the bottle mouth clean
and tidy.