Use grease: Apply proper amount of vegetable oil such as olive oil and cooking oil to the knot, and then gently swing the chain, and the knot will loosen quickly.
Needle: insert a thin needle into the knot, and then gently pick the chain, and the knot will gradually loosen.
Use toothpick: insert a toothpick into the knot, gently twist and shake the chain, and the knot will gradually untie.
Finger use: put the left and right index fingers and thumb at both ends of the knot, gently pull it, and then gently rotate both ends to gradually loosen the knot.
Use the hair dryer: set the hair dryer to medium air volume and temperature, blow air into the knot, and gently pull the chain at the same time, the knot will be quickly loosened and finally untied.
All the above methods need patience and care to avoid chain breakage caused by excessive force. When storing necklaces, you can also use professional tools such as bead chain bags to avoid knotting caused by long-term stress.