05/21/2026
100%
Don’t spend hundreds on an exterminator, do this.
Pour approximately 1 cup of 3% hydrogen peroxide (H₂O₂) down each drain at night for 7 consecutive days.
Flush with hot water the next morning.
Why it works:
Drain flies don’t actually live out in the open.
They breed inside the slimy organic buildup coating the walls of your plumbing.
Hydrogen peroxide helps in two ways:
• It oxidizes and breaks down the scum layer where the flies lay eggs
• The oxygen-releasing reaction can damage and kill the soft-bodied larvae living inside the buildup
That bubbling action you see?
That’s the peroxide reacting against the organic biofilm inside the pipe.
Don’t forget:
• Bathroom sink overflows
• Floor drains
• Laundry drains
• AC condensate drains
Most people spray the flies they can see.
The real problem is living inside the pipe.
Cheap. Simple. Effective. 🔥