How to Get Rid of Cockroaches (DIY Guide)

First things first: seeing cockroaches does not mean your home is dirty. Roaches can infest even the cleanest homes because they're not just after food — they need warmth, water, and shelter, all of which every home provides. That said, reducing food and water sources is a huge part of getting them under control.

The two most common home-invading species are:

• German cockroaches — Small (½ inch), light brown with two dark stripes behind the head. These are the most common indoor roach. They reproduce insanely fast (a single female can produce 300+ offspring in her lifetime) and are almost always an indoor-only species. If you're seeing small roaches in your kitchen or bathroom, this is probably what you have.
• American cockroaches — Large (1.5–2 inches), reddish-brown, sometimes called "palmetto bugs" or "water bugs." These typically live outdoors and come inside through drains, gaps under doors, or open windows. They're startling but generally easier to control than German roaches.

The approach differs slightly depending on which species you have, but the fundamentals are the same: bait, clean, and seal.

• Gel bait — The most effective DIY roach treatment. Apply small dots in cracks, crevices, and areas where you've seen activity.
• Bait stations — Good for supplementing gel bait, especially in areas where gel might be messy (under appliances, in cabinets).
• Boric acid powder — A classic roach killer. Apply a very light dusting in cracks, under appliances, and inside wall voids. Too much and roaches will avoid it.
• Caulk — For sealing cracks and crevices where roaches hide and enter.
• Drain covers or stoppers — If roaches are coming up through drains (common with American cockroaches).
• Flashlight — For inspecting dark hiding spots.
• Cleaning supplies — Degreaser for kitchen surfaces, disinfectant for contaminated areas.

Step 1: Identify Which Roach You Have

This matters because it determines your strategy. Small (½ inch), light brown roaches in the kitchen or bathroom? German cockroaches — they're indoor breeders and you need aggressive baiting. Large (1–2 inch), dark reddish-brown roaches that seem to appear randomly? American cockroaches — they're likely coming from outside, and sealing entry points is your priority.

Step 2: Deep Clean (Seriously)

Before you put out any bait, you need to eliminate competing food sources. Roaches will ignore your bait if there's easier food available.

• Clean behind and under the stove, refrigerator, and dishwasher. Pull them out — you'll probably find a grease buildup that's been feeding roaches for months.
• Degrease all kitchen surfaces. Grease is a primary food source.
• Clean inside cabinets, especially under the sink.
• Fix any leaky faucets or pipes. Roaches need water even more than food — some can live a month without food but only a week without water.
• Don't leave dishes in the sink overnight. Ever.
• Take out trash every evening.

Step 3: Apply Gel Bait

Apply small pea-sized dots of gel bait in these locations:

• Inside cabinet hinges and the gap where cabinets meet the wall
• Under the sink, near pipes
• Behind the stove and refrigerator (along the wall)
• Along baseboards in the kitchen and bathroom
• Inside electrical outlet covers (turn off the breaker first)
• Any crack or crevice where you've seen roaches or droppings

Apply small dots every 12–18 inches. More small dots beat fewer large globs — you want roaches to encounter bait no matter which path they take.

Step 4: Apply Boric Acid in Hidden Areas

Lightly dust boric acid powder under appliances, inside wall voids (through gaps around pipes), and in the back corners of cabinets. The key word is lightly — if you can see a visible pile, it's too much. Roaches will walk right around a heavy application. You want a barely-visible film that they walk through unknowingly.

Step 5: Seal Entry Points and Hiding Spots

Caulk every crack and crevice in your kitchen and bathroom. Pay special attention to:

• Gaps where pipes enter walls (under sinks, behind toilets)
• Cracks between countertops and walls
• Gaps around electrical outlets and switch plates
• Where baseboards meet the floor
• Around door and window frames

For American cockroaches, install drain covers over floor drains and plug sink drains at night.

Step 6: Monitor and Reapply

Check your bait placements weekly. Reapply gel bait as it's consumed or dries out. You should see a significant reduction in roach activity within 1–2 weeks. Continue treatment for at least 4 weeks, since roach eggs (oothecae) take about 4 weeks to hatch, and newly hatched nymphs need to encounter bait too.

• Make it a habit: nightly kitchen reset — Every evening before bed: wipe counters, sweep floor, put away food, take out trash, run garbage disposal. This 5-minute routine eliminates most of what attracts roaches.
• Fix all water leaks immediately — A dripping faucet or sweating pipe is a roach water fountain. Roaches are more attracted to water than food.
• Don't bring them home — German cockroaches spread via cardboard boxes, grocery bags, used furniture, and appliances. Inspect secondhand items before bringing them inside. Break down cardboard boxes and remove them from your home promptly.
• Seal gaps around pipes under every sink — This is the #1 entry point for roaches moving between apartments and within houses.
• Use trash cans with lids — Both indoor and outdoor. Empty indoor cans daily.
• Don't leave pet food out overnight — Pick up pet food and water bowls before bed.

• Bug-bombing (foggers) — Roach foggers are nearly useless. The aerosol doesn't penetrate the cracks where roaches actually hide, and it contaminates your surfaces with pesticide. Worse, it disperses roaches to other areas of your home. Every pest control professional will tell you: don't use foggers.
• Using spray as your only treatment — Contact spray kills the roaches you see but does nothing about the ones hiding in walls. It also repels roaches away from areas where you might place bait. Use bait as your primary weapon.
• Not cleaning before baiting — If you put out bait but leave crumbs and grease everywhere, roaches will eat the free food and ignore your bait.
• Stopping treatment too soon — Roach eggs hatch over a 4-week cycle. If you stop treatment after 2 weeks because you're not seeing roaches, a new generation will emerge from eggs that were laid before you started. Keep treating for at least 4–6 weeks.
• Ignoring the bathroom — Everyone focuses on the kitchen, but bathrooms provide the moisture roaches crave. Treat both areas equally.