All bar glassware goes through the tumble-wash cycle: glasswasher → rinse station → fresh tumble in clean water → air-dry on a clean towel. Spot-check every coupe and Nick & Nora before service. Any spot is sent back. The visual difference between a properly tumbled coupe and a smudged one is the difference between a $20 drink and a $20 drink that feels sloppy. See rule-pristine-glassware.