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Enzyme Drain Cleaner Gel

8.7/10 Our verdictHands-on tested, not gifted

The $15 gel that finally killed my drain flies. They breed in the gunk in your pipe walls, which is why boiling water and bleach do nothing.

Best for
Drain flies
Tested
Gone in 3 days
Price
Budget
Kills them at the sourceCheapSafe for pipesTakes a few nights
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The full review

Why they keep coming back

I lived with what I thought were fruit flies for four months. I threw out produce, took out the trash, cleaned the counters, nothing changed. They were drain flies, and they actually live IN the drain, breeding in the gunk that builds up on the pipe walls. Pouring boiling water down does basically nothing, and bleach does nothing because they live in the slime above the water line.

The thing that actually works is an enzyme drain gel, it eats the gunk they breed in. I poured it down before bed and repeated it the next two nights. Gone in three days.

What I liked

  • Targets the breeding gunk in the pipe
  • Only about $15
  • Enzyme formula is pipe-safe
  • Worked in three nights

What to know

  • Not instant, needs a few nights
  • You have to identify it's drain flies first
  • Repeat if the drain is very gunked
  • Doesn't replace occasional drain cleaning

Common questions

Fruit flies or drain flies?

If they hover right around the drain and keep coming back after you clean the kitchen, they're drain flies breeding in the pipe.

How long does it take?

Three nights of the enzyme gel cleared mine completely.

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