A customer's complaint about our coffee machine taught me to shut up and listen
I was working the morning shift at the cafe in the downtown library, and this regular, Mr. Henderson, came in looking mad. He pointed at our big espresso machine and said, 'Your steam wand is making a weird hissing sound, like it's got a leak.' I almost brushed him off, thinking I knew the machine better, and told him it was just the normal purge cycle. He got real quiet and said, 'I was a maintenance engineer for thirty years. That's a failing gasket.' I shut my mouth, called our repair guy, and sure enough, a tiny seal inside the steam valve was shot. It would have blown completely during the lunch rush. Now when a customer says something's wrong, even if I think I know better, I stop and really hear them out first. Has a customer ever pointed out a problem you totally missed?