That's when I found PestLab.
I almost kept scrolling.
I remembered those cheap ultrasonic devices from discount bins. They never worked.
But PestLab explained exactly why those failed and why it's different.
Early ultrasonic devices used weak, fixed frequencies that bounced off walls instead of penetrating them.
PestLab uses two mechanisms working together:
Mechanism 1 — Ultrasonic waves at variable frequencies between 25 and 65 kilohertz. This range is specifically validated to penetrate standard residential drywall and reach the structural voids where the hidden colony actually lives. Not the room. The walls.
Mechanism 2 — Electromagnetic pulses that travel through your walls and building materials, disrupting the nervous systems of roaches in spaces that even ultrasonic waves can't fully reach behind baseboards, inside cabinet frames, under flooring.
Together, they make the entire structure of the home every hidden space, every wall cavity, every dark void an environment roaches cannot tolerate.
They don't die. They leave.
And here's what made me cry a little when I finally understood it:
There is nothing in the air. Nothing on the surfaces. Nothing that settles at the height my daughter breathes and touches and puts in her mouth.
No label to read. No warning to follow. No "keep children away" instruction.
Just two small devices plugged into outlets.
Cora could be on the kitchen floor while PestLab ran. Nothing about that equation had changed for her.
Everything had changed for the roaches.