Drain Flies in the bathtub

Did you guys have has that problem before? Those little dudes keep coming back, tiny little flies. I tried several products, even Hydrogen peroxide, kabi killer, they keep showing up.
Any tips how to deal with it?

11 comments
  1. In our place I noticed they breed in the small amount of water that stays under the unit bath when it drains. When I took the side panel off, there was about 2-3 mm of water in there, and I could see little black ‘worms’ swimming about in it. These are the larvae. Had to clean that whole area out with the old kabikilla. That stopped them for a while, but they do come back.

  2. Kill any flies you see and pour boiling water into the drain at least twice a day for a few days in a row until you don’t see live ones anymore and continue for a couple days after that. At least that’s what worked for me when bleach/kabikilla did jack

  3. The last time I tried to give someone advice on this I accidentally gave them instructions on how to make a deadly chlorine gas.

  4. Yeah, they appeared during 2 seasons in my case. Although I think it was the sink, not bathtub. Don’t remember well.

  5. Do exactly this: FLUSH with 3 full buckets of water. Pour bleach down. Flush again with 3 buckets of water. Do this everyday for one week. The flies will disappear.

  6. Get those white home center nets to cover the metal drain cap, they come up through the grill there. Open the window too if you can since they like that stale humid bathroom air.

  7. I literally just had drain flies a few weeks ago under my bathtub. I had to remove the apron and spray a foam under there + a powder when the foam was not enough. That did the trick for me.

  8. The problem is that there’s organic debris clinging to the inside of your drain that the flies are laying eggs inside and feeding on. I know that’s a yucky thought, but it’s what’s going on, and points you to potential solutions.

    1. Clean the drain. This means removing hair (a task I hate), and maybe giving the drain a good snaking to dislodge the debris. Yech!
    2. Follow up with a bucket of boiling water. Not because this will kill the flies (because those suckers are unkillable!) but because the hot water will help clean the drain and wash down body oils and other stuff that’s helping the debris stick inside the drain.

    Repeat this a few times. Clean, wash down with boiling water. You’ll remove the debris where the flies are nesting and feeding, and they’ll disappear.

    I’ve also found flushing my drains with citric acid (available in bags at your local Daiso) and boiling water once every couple of months helps to prevent this. I think that the citric acid and boiling water is breaking down the oils that help hair and skin cells from the bath “stick” to the inside of the drain, and so the flies just never have a place to breed.

    The hair problem… unfortunately that needs to be manually removed every week or so because I live with long-haired people who shed like crazy.

  9. Vinegar and lemon juice? Becareful what your pour down there btw, could make a chemical burning agent if your not careful. Have you tried a chemical drain cleaner by any chance? I’d give it a week or so just regular washing than try a commercial drain cleaner

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