I just bought an ultrasonic cleaner, and I am amazed at the results of cleaning down in the hard to get places like around small inscriptions and fine
details. As mentioned earlier, really hard encrustations won't budge, but I'd dare say that it will save you a lot of time in scrubbing and picking.
I submersed a plastic cup
filled with hot, soapy water into the machine (also filled with hot water), then placed the coins into the cup
. This way the coins are not rubbing against the metal pan
, and the water in the cup
can be changed without dirtying the pan
water. The cup
doesn't seem to reduce the cleaning effect at all. I have noticed a marked difference in the efficacy of hot versus cold water. Be sure to change out the water often to keep it hot. It will help
the cleaning process considerably.