Be careful to not wear any jewelry that may chip the piece.  Use room temperature water with a little woolite in it. I find that woolite works better than anything else.  Do not let the piece hit anything hard (faucet or sink sides).  Rinse with room temperature water.  I wash larger pieces by placing them on a towel on the kitchen counter top.  I let the soapy water and then the rinse water flow onto the floor and mop the floor when done. I use a plastic tupperware item to pour the water over the item.   I figure a few minutes mopping costs less than replacing an item that may be valued in the hundreds or thousands.  I put punch bowls upside down to wash the cut glass pattern.  I wash the inside using first a sponge with woolite, then dry with paper towel, then use wet paper towels to clean out the woolite. Wood toothpicks work well for getting gunk out of the intricately cut patterns when a sponge doesn't work.   I found that woolite also works for ceramic and porcelain items.