Even in a vacant home, a leaky faucet will cause damage to itself, the sink and the drain plug. Water slowly leaks through the faucet and evaporates leaving a deposit of minerals on the surface finish. Some cleaning chemicals will remove the minerals but chances are, the surface finish may be damaged permanently.
It is important to detect and address this problem early to avoid permanent damage and possible costly replacement of the fixtures.
JP at Home Watcher LV