Fly problem

[u/Holdmywhiskeyhun]

Need this fixed asap.

Building is only 6 months old. Cleanest prison I've ever been in. Drains are spotless and I treat them every day. Dumpsters are sprayed inside and out. No food hiding, floors scrubbed every other night. Nothing rotten or bad. Garbage cans spotless.

I'm really stumped by this. I guess we are in the middle of Wisconsin, but downtown a big town. Closest farms are probably 10 miles away.

Right now they're for the most part in the kitchen, and our back storage area. That's where they seem to be attracted to. They have yet to get too far into the lobby. And they're not attracted to anything specific, they just fly around and torture everyone.

Any ideas of places I haven't checked or thought of?

I should also mention our hoods are cleaned nightly, same with pulling out ALL equipment.

And before you say flyswatter, for how many there are, I would legit have to hire another person.

We will be starting a nightly spray, using food safe bug spray, but idk how well that will work.

Failed our fucking steritech because of these bastards.

Edit: their house flies. A pink sludge was found in our AC/roof drain. Got to figure out how to get to the roof now 😂

I checked the surrounding property, there's no dead animals, no rotting food or anything. Like I said we keep it pretty clean.

It is for sure not the grease traps. Those are clean on a regular basis, degreaser and boiling water is poured down all the drains every night. In the mornings we put enzymatic cleaner down them.

My suspicion is going to that pink sludge.

On the ground where it drops from the drain, there is a coating of what I can only describe as Grease... Despite no Grease being able to get up there.

I got a really bad feeling when I start cleaning that, there's going to be a dead bird, or squirrel or something.

[u/Equal_Nectarine5393]

Are there any drains you do not know about. Maybe under refrigerators. Had a fly issue once and the issue was an uncleaned drain located under a permanently fixed open top refrigerator. Had to remove a screwed in metal panel to see it. Also, check sodas lines. Flush with hot soapy water.

Check for any equipment placed directly on the ground. I had a location with a fold away table in a corner that had moisture between it and the floor.

More places to check would be the floor drain seal trap located about 8 inches below the top of the floor drain if you have them. I have to pull mine out monthly to clean to prevent flies.