Fifteen Years in Pest Control Taught Me About Keeping Bugs Out

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A woman in north Whitby once called me convinced her attic was haunted. Thumps at three in the morning, she said, and something that sounded a lot like footsteps. I got up there with a flashlight and found a raccoon looking back at me, with three kits tucked behind the insulation. She’d pried open a loose soffit sometime in March and moved in like she owned the place.

I tell that story because it shows how most of these problems actually begin. Nobody’s house gets “infested” overnight. There’s a gap somebody missed, or a soggy bit of wood, or a forty-pound bag of sunflower seeds sitting open in the garage. The animals don’t break in so much as accept an invitation.

So, a few things I’ve picked up.

Mice need less room than you think

A pencil-sized hole is plenty. Honestly, I’ve seen them get through less.

Once a year, usually late September, walk around the outside of your house slowly. Not a quick lap. Crouch down. Look at where the dryer vent goes through the wall, where the gas line comes in, and the bottom corners of the garage door, which are always chewed or warped. Pack small gaps with steel wool and caulk over it. Foam alone won’t stop them. They’ll chew right through it, sometimes in a single night.

Indoors, look in the drawer under the oven. Nobody checks there, and mice love it.

Carpenter ants and the damp-wood problem

If big black ants start turning up in your kitchen in April, pay attention. One or two might have just wandered in. A steady trail usually means there’s a nest in the structure, almost always in wood that’s been staying wet. That could be a window sill that leaks, a deck ledger board, or the area behind a dishwasher with a slow drip nobody’s noticed.

Look for tiny piles of what looks like sawdust along baseboards. That’s frass, and it means they’re digging out galleries in the wood. They don’t eat it. They just hollow it out to live in, which isn’t much comfort when it’s your house.

Homes near the lake get hit harder because the air stays humid all summer, and I’d guess that’s a big reason pest control Whitby searches spike every spring. Don’t put it off until fall. A colony that’s been in there two or three seasons can do real damage.

The best long-term fix is dull: clean your gutters, run a dehumidifier in the basement, and fix leaks as soon as you find them.

Stop leaving out a buffet

Pet food goes in a sealed bin. Birdseed goes in a metal can with a lid, not a plastic tote, because squirrels will get into those. Clean out the barbecue grease trap. Keep the compost lid closed.

Garbage night deserves its own warning. Raccoons around here know the collection schedule better than some residents do. Putting the bins out the morning of pickup makes a bigger difference than any lock I’ve tried.

When to put the spray bottle down

I’m happy when homeowners handle things themselves. Snap traps baited with peanut butter work great, and sealing entry points is something you can absolutely do on a Saturday afternoon. There are a few situations where I’d stop, though.

Bed bugs, for one. Store-bought foggers mostly scatter them into wall voids and neighbouring rooms, and then a problem in one bedroom spreads through the whole house. Wasps nesting inside a wall are another, because spraying the entrance can drive them indoors. That’s a bad afternoon. And wildlife in the attic is a legal issue in Ontario, not just a practical one. There are rules about how animals can be removed and how far away they can be released, so you can’t trap that raccoon and drop her off out by the 407.

If you’re bringing someone in, whether you’re looking at pest control Oshawa companies or anyone else in Durham, notice whether they actually come look before quoting. A phone quote for a problem nobody has inspected is a guess. A decent tech will spend more time on how the pests are getting in than on what they’re spraying.

Also Read: How Often Should You Schedule Pest Control in Coastal Virginia?

A small habit that helps

Keep a note on your phone. Just the date, what you saw, and where. My wife thought I was being ridiculous when I started doing it at our place. Three years later, we know the ants show up in the second week of April, right by the back slider, every time. Now I treat that spot in late March, and we haven’t seen them since.