Never use hot water or place in dishwasher for standard PLA. Place on top rack of dishwasher for dishwasher safe only. Hand wash only using tepid, soapy water and a soft bristled brush. A toothbrush works great. As with any cookie cutter, flour the dough and cutter generously. Best used with chilled dough.
PLA is the common name for Polylactic Acid or Polyactide. PLA is made from starch rich plants such as corn and sugar beets.