[header] How to clean cultured marble [title] Dampen a clean rag with white vinegar. [step] Your rag should be wet through with white vinegar, but excess vinegar should not drip or seep from the rag. Either pour vinegar onto your rag in a sink or dunk your rag in vinegar in a bucket. 
Wring out the rag lightly over a sink. [substeps] Too much white vinegar can cause this liquid to spread to areas of the marble that are already clean.