Hot take: that little puddle under the dishwasher at the Maple St job was NOT just a loose drain hose fitting
Last Tuesday I was at a rental on Maple St pulling a dishwasher I'd already been out to twice for a slow drip, and this time the cabinet floor was soft enough that my screwdriver sank in. I pulled the unit, and the real problem was a pin hole leak in the copper supply line back near the wall that had been spraying into the cabinet for who knows how long, so the drip tray was catching maybe a quarter of it. I shut the valve, showed the landlord the rot, and told her the repair is hers before I touch anything else. Now I poke every cabinet floor with an awl before I quote a dishwasher leak, costs me 30 seconds. What's your go to move for catching hidden supply line leaks before they turn into a floor job?