Listed below (in the preferred order of use) are the solutions that can be used for cleaning.
1. Clear, warm water.
2. Mild, soapy, warm water (Ivory liquid dish soap recommended), then rinse.
3. Isopropyl Alcohol (a.k.a. rubbing alcohol).
4. Do not use solvent-based cleaning agents, lacquer thinners, nail polish remover, pine oil, or cleaning agents containing bleach, which may cause discoloration over a period of time.
5. Cleaning is recommended to be done with a natural sponge. A cloth or towel should only be used to tamp dry (not rub). Do not use manmade (i.e. polyester) sponges.