I don’t know too much about it, but I think there are people who pour lead to remove a possible ay”h. I’ve seen an advertisement in Mishpacha with info of someone from Israel (they say they have haskamos).
I believe there is also a Tefilla (possibly from the Chida) that serves a similar purpose. Maybe someone else would know more about it.
(There is probably at least one more thread on it which I cant find now)