Getting “tingle” from my machine.
503 Singer bought new in the 1960’s by my Aunt so I am 2nd owner. Good shape, sews great. When I lay my right arm on the machine bed to begin sewing, I get a mild electric “tingle”. As the machine begins to pull fabric, I automatically move/raise my arm so it’s not bothering me then. I do unplug when not in use.
a). Should this worry me ?
b). Will it be a costly fix ?