Wipe away as much loose dirt and dust as possible with a clean cloth. Use a small brush such as a toothbrush to get into hard to reach areas.
Fill the sink with warm water and add enough of a mild dish soap to make the water sudsy.
Submerge the sculpture in the water. If the statue is too large to pick up and fit into the sink dip a clean cloth into the water and dampen it this way.
Wash the sculpture with a clean cloth or sponge dipped in the soapy water. Use the brush dipped in the soapy water to clean the harder to reach areas.
Rinse the sculpture with warm water. If the statue is small, rinse it in the sink; for larger sculptures, simply pour warm water over them.
Dry the sculpture with a soft clean dry towel to remove excess moisture.