What’s the best way to untangle a knotted necklace chain?

Sprinkle baby powder or cornstarch directly onto the knot to reduce friction between the chain links, then use two fine needles or straight pins to gently tease the knot apart.

Place a tiny drop of baby oil or olive oil on the knot with a cotton swab, let it soak in for a minute or two, then use fine pins to work the lubricated links apart.

Place the knotted section of the necklace on a hard, smooth surface and apply gentle vibration to encourage the links to shift apart on their own. This works best on loose or minor tangles rather than tight knots.