Crystal glassware requires basic cleaning and polishing to maintain its shine. However, if some of the pieces of glassware are severely scratched or uneven, you may want to grind them. Grinding works best on thick, straight pieces of crystal and will have negative side effects on curved surfaces such as glasses. To keep your crystal in good condition, clean it regularly and store it in a dry, temperature controlled location such as a pantry.
Grind the glass, if necessary. Set your electric grinder on a flat surface. Set your piece of glass against the grinder and turn the grinder on. Push the glass into the grinder. Turn the glass over and push it into the grinder. Repeat this process once more, if necessary.
Sand the crystal using a 1,200-grit emery paper, if necessary. Sand any crystal that is slightly scratched or uneven. Sand as an alternative to grinding. Sand lightly and rub both sides of the crystal.
Wipe the glass with a clean, lint-free cloth.
Clean the crystal. Run the crystal under warm, soapy water.
Rub the wet crystal with a clean, soapy towel. Add about one tablespoon of white vinegar to the towel to prevent fogging.
Rinse the crystal with warm water. Allow the crystal to air dry.
Polish the crystal using toothpaste and a toothbrush. Place a drop of toothpaste on the tooth brush and rub it against the crystal using a circular motion. Rinse the crystal with warm water.