The Memsaab likes black tea which stains even china cups very quickly yet alone the melamine. We found denture or bottle sterilising tablets were excellent at cleaning, but felt it was expensive as by experimentation we could cut the tables into quarters which work just as well. But we found the tablets did not split very neatly and often crumbled, so we went to bottle sterilising fluid which worked out even cheaper. Its sometimes difficult to find at Tesco or Morrisons, but so far Sainsbury's seem to keep it