Tech arrived and was shown to kitchen sink, to which customer explained that it was leaking from the top, beneath the handle, as well as underneath the sink. Tech discussed options with customer. customer chose to diagnose faucet before opting to replace or repair faucet. Tech pulled mixing valve from faucet inspected and cleaned off. Mixing valve was put back in and tighten down Prior to turning water back on and testing. Tech ran sink testing both hot and cold on and off ensuring that the leak was no longer present.