CLEANLINESS OF FIRST IMPORTANCE
Glue is extremely sensitive to impurities.
Cultures of germs are grown by bacteriologists in gelatine glue because they afford an ideal breeding place for germs.
Glue quickly absorbs odors, and decays rapidly if exposed to impurities.
Decayed or decaying glue is not only extremely unpleasant to handle, but it is worthless to work with. Keep your glue clean. Keep it away from strong odors. Glue will keep sweet and clean before melting just as long as you care to keep it so.