Cleaning someone's home can get complicated. Should you use an acid-based cleaner on a marble vanity? Can you employ an abrasive sponge to get pot marks off stainless steel? Under most circumstances, the answer to both questions is NO, but that doesn't necessarily mean your maid got the memo. The average cleaning professional may never receive formal training. To help ensure that your maid doesn't ruin your Oriental carpet or destroy your antique mirrors, be present for the first cleaning. Offer suggestions, and provide detailed instructions. Make sure your instructions make it into your customer file, too.