If it’s primarily a tarnish issue, you might look into one of the
Speed-Brite cleaners offered by most suppliers. I have the one that
hooks on my ultrasonic, but they make standalone units, as well. Good
for silver tarnish (and virtually any stones), except in maybe the
most severe cases. I recently resurrected a bunch of sterling dangle
earrings I made a few years ago, and only a couple pairs required
individual attention after Speed-Brite sessions.
I recently dipped a bunch of loose round sterling beads, using
Goddard’s, and was unable to discern a distinct improvement
afterwards. I’ve had it stored in a area without climate control for a
while… maybe it’s got a shelf life?
Sebaste Studio and
Carolina Artisans’ Gallery
Charlotte, NC (USA)