It is, indeed, important to get the pickle out of hollow forms. The
best way I've found to do that is to first neutralize the pickle by
placing the hollow form in a fairly concentrated solution of baking
soda and water. You can then place the container in the ultrasonic
for 1/2 hour or so, or can boil it for about an hour. I've also been
told that you can microwave it safely as long as the piece remains
Once the baking soda has thoroughly neutralized the pickle, remove
the piece, rinse thoroughly and repeat the process with plain water.
To dry the piece inside, I place it with the hole-side UP on thick
paper towel and use a hair dryer to thoroughly heat it, then keep it
hot for several minutes. This doesn't get it hot enough to oxidize,
but does evaporate out the water (you'll see it bubble up and out).
Additional drying in sawdust or another dessicant might be a good
idea if you feel the piece is still not completely dry.
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