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Some stores sell smoke bombs to drive animals out of spaces, but we don’t recommend you use them, especially in an attic. The smoke can be toxic to humans or pets that may accidentally inhale it. Meanwhile, critters can easily escape the smoke by temporarily leaving the attic, only to return via their usual entry points after the smoke clears.

Leaving lights on is not an effective or foolproof method for keeping cockroaches away. While roaches are nocturnal and prefer darkness, light alone is not enough to stop them, especially if they are seeking food, water, or shelter. A bright light might temporarily discourage them, but hungry or determined roaches will often adapt and venture into lit areas. For more effective cockroach control, it is better to focus on proven prevention methods. These include maintaining cleanliness by eliminating food crumbs, sealing cracks and entry points, reducing clutter that provides hiding spots, and fixing any moisture issues. Using traps or repellents can also be part of a comprehensive strategy.

Yes. German cockroaches are masters at hiding. If you notice one cockroach, especially in daytime hours, it’s very likely that other roaches aren’t far behind, or that the problem is growing. You don’t even need to see roaches to have warning bells go off: Many homeowners discover roach problems by noticing specks of droppings on the floor or roach smells.

There are several things to consider before you hire a professional exterminator:

• Do they have the proper licensing?

• Are they experienced?

• Do they use eco-friendly products?

• Are their products pet safe?

These are questions to ask yourself when you’re on the hunt for an ant exterminator, but you can also ask the exterminator or pest control company directly.