Kill them on sight. Our store isn’t allowed to put down fly traps of any kind, so I just resort to punching them out of the air and curb stomping them.

Just gonna drop my two cents in here. I don't usually do this but flies are one of my nuclear pet peeves so figured I'd just throw this into the ether.

General rule of thumb for why flies in any restaurant, not just starbs is standing water, drains, 3D buildup.

Dunno if you're barista, ssv, or sm, fixing flies is usually a store level problem that can't really be fixed by one person alone. It takes a team effort across shifts and dayparts. If you're a barista or shift then my love, the flies, they are above your pay grade. Ain't nothing you can do to fix it on your own.

Anywho, make sure drains are clean, hit your base boards once a week, if you're using restroom cleaner on your floors STOP asap, figure out where 3D buildup is, dead space, etc. If you're in a mall, good luck. Everything harder in malls.

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How often are you cleaning drains & dipper wells? That’s where they come from.

We keep all our refreshers on cubes except the pitcher that’s on bar. The cubes stay in the fridges. Also, you have to clean and ice the drains daily during the summer and make sure you’re wiping down anything at close that could have gotten splashed with syrup/juice.

ETA: any partial pitchers at the end of the day are stored in the fridge overnight as well.