How to really, truly, finally get rid of fungus gnats for good: We asked the pros

I accidentally brought a plague upon my house. Google searches for “fungus gnats” and related insect elimination queries have ticked up since the start of 2020, as the people projecting pandemic stress onto their plants have found themselves in the same position I’m in. Here’s what I have spent trying to combat the problem: — Three 48-packs of sticky traps: $44 — Landscaping sand: $15 — Beneficial nematodes: $60 — Steel wool: $10 — Neem oil spray: $11 — Katchy: $40 — Bag of cedar shavings: $10 — Three Venus flytraps and specialty potting mix: $66 — Mosquito bits: $19 — Hydrogen peroxide: $5 — Bonide Systemic Houseplant Insect Control granules: $22 Total: $302. Here’s what works Eradicate your fungus gnat infestation for good with the following method: Put up a bunch of sticky traps, top-dress the soil with sand and do nematode soaks every 10 to 14 days until the problem is resolved. You dilute hydrogen peroxide in water at about a 1-3 or 1-4 ratio and thoroughly soak your plant’s soil until it comes out through the drainage holes.