Why Cockroaches Are Hard to Eliminate
Cockroaches are nocturnal, fast-breeding, and resistant to many common insecticides. A single female can produce up to 300 offspring in her lifetime. To eliminate them, you need to target the entire colony — not just the ones you see.
Step 1 — Identify the Signs
Before treating, confirm you have cockroaches and assess the severity. Look for droppings (like black pepper near appliances), egg cases in dark corners, shed skins, and a musty odor. Spotting cockroaches during daylight is a sign of a large infestation. Read 5 Signs You Have a Cockroach Problem for a full checklist.
Step 2 — Apply Gel Bait
Gel bait is the most effective cockroach treatment available. Unlike sprays, cockroaches eat the bait and carry it back to the nest, killing the whole colony from within.
Apply Sulguy Cockroach Gel Bait in small dots (about the size of a pea) in cracks, crevices, behind appliances, under sinks, and inside cabinet hinges. Reapply every 2–3 weeks until activity stops.
Understand why sprays don't kill cockroaches before reaching for a can.
Step 3 — Set Glue Traps to Monitor
Place Sulguy Glue Traps along walls and under appliances. Check every 3–5 days — the catch rate tells you where activity is highest and whether the population is declining.
Step 4 — Apply Diatomaceous Earth as a Barrier
Dust Sulguy Diatomaceous Earth Powder along baseboards, behind appliances, and around entry points. It kills any cockroach that walks through it and provides continuous protection. For severe infestations, Sulguy Crawling Pest Control Powder Spray provides an odorless soluble formula that can be applied to hard-to-reach areas.
Step 5 — Seal Entry Points
Caulk all gaps around pipes, baseboards, and under sinks. Install door sweeps. Cockroaches enter through the smallest openings — sealing them prevents re-infestation. For a full prevention plan, read The Hidden Places Pests Breed in Your Home.
How Long Does It Take?
With consistent gel bait application and monitoring, most cockroach infestations show significant reduction within 2 weeks and full elimination within 4–6 weeks. Persistence is key — missing one application round allows the colony to recover.
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