Yesterday Don wrote that he was having a problem with Plastic frames.  The
bees built comb on the frame tops making separation of a super above
difficult.
 
I don't know if  these were Pierco frames, but I have had the same problem
with Pierco's.  In fact, I have the plastic frames mixed in with
conventional wood frames, and only one or two plastic frames will caused
the supers to stick together.  The plastic frames must be individually
separated from the frames above to separate the supers.
 
I have talked to Nick at Pierco about this.   Apparently there is no
solution.   It is not a problem caused by inappropriate frame spacing, but
just an idiosyncrasy of the Pierco frame.  Perhaps any plastic frame?
 
Jim King, Riegelsville, PA