The newspaper trick, reported by others is the oldest and works fine.
However, newsprint will be left on the buckets and must be washed off.  For
that reason, plain wrapping paper or butcher paper works better.

When buckets are stuck together, using a hose to run a small amount of water
into the seal will immediately loosen the buckets.

Lloyd
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Lloyd Spear Owner, Ross Rounds, Inc.  The finest in comb honey production.
Visit our web site at http://www.rossrounds.com.