I have mould forming in my glue pot.  I have tried cleaning the pot,
and mixing a new batch.  When I come back a week later to use it,
patches of mould have formed.  Is it necessary to make up a fresh batch
each time?  If the mould is scraped off and the glue used, is it's
strength weakened or does it do any harm?

Looking forward to hearing from the people that know.  I have just
recently joined the group, and find the Digest informative and
interesting.  Keep up the good work.

John M. Ross