I’ve never heard of this til today and nothing I can find online is proving it’s true or that it’s a hoax.
Imagine your hair is like a balloon and when you rub it with a towel, it gets all staticky and sticks up. Now imagine if you put some powder on the towel before you rub it on your hair. The powder helps stop the rubbing and the static charges from building up, so your hair stays nice and smooth. That’s what baby powder does too! It helps stop static charges from building up on things like clothes or blankets, so they don’t stick together or make crackling noises.
Static electricity is an imbalance of electric charges within or on the surface of a material or between materials. The charge remains until it is able to move away by means of an electric current or electrical discharge.
Baby powder basically “levels off” your charge, because it’s made out of really tiny particles
At least that’s how I understand it… I heard this explanation long time ago