Stubborn Fruit Flies in Sink

I had them a few weeks ago. I got some eco clog preventer from Lowe’s. Poured it in at night and closed the drain and then opened and rinsed with hot water the next morning. Seems to have worked.

Zep drain the fence worked for me. Cheaper at Lowe's or home Depot than Amazon. I believe they're coming in with the produce from the produce market. Mainly the big jumbo onions. At least for me. Apparently it's not caustic so you can leave it down there overnight further directions.

Drain fly foam

Zevo flying insect spray first thing in the morning when I come in kitchen, start at drain and work out. Especially if leaving some bits of stuff in drain. Then spray garbage. Add in the red apple looking traps with the vinegar smelling solution around sink and other parts of kitchen.

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then they sell these little fruit fly traps that look like apples.

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We fought these damn flies for a couple weeks before we realized they were in the sink/drain. Did the Vinegar/Baking soda/Hot water deal down the drain once a day for a few few days, bought some sticky traps that plugged into an outlet that seemed to help a good bit, and the fruit fly apple looking traps, which Im 99% sure is just apple cider vinegar.

Are they fruit flies or drain flies?

Fruit fly trap worked for us.

You can catch a bunch of them with apple cider vinegar and a drop of dish soap in a small jar or anything like that as well.