If there are no potential problems, the piece can be immersed. Otherwise, it should be cleaned as for glazed earthenware. Figures should not be immersed (see Potential Problems ).
1. Clean one piece at a time in a plastic bowl (to avoid knocking against taps) containing warm water with a few drops of detergent (about one drop per litre of water)
2. Use a wet cotton wool ball to wipe over the surface
3. Rinse in clean water to remove detergent residues
4. Blot dry with a paper towel