I know your pain after going through practically every ISIS bb out there thinking everyone one of them was creaking, turns put it was my sliding dropouts. I now have a stock of ISIsS bb’s. I you havn’t already, try some copper slip on what ever your ss solution is ( unless it’s using a singulator then ignore me!!). You to may have a collection of perfect Isis bb’s too!
Oh and if it is the bb, my superstar one was poorly sealed and is now crunchy. I am runing a crank bros one that has been in for 2 years no issues.