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Roach spray usually starts working almost immediately on contact—within seconds to a few minutes. However, if it's a residual spray designed to keep killing over time, it can take hours or even days to fully affect roaches that come into contact with treated surfaces. For larger infestations, it may take at least a week to see a noticeable drop in activity, since not all roaches are exposed at once.

You can use bleach to kill fruit flies, but it's not the best option because bleach can be toxic to people when used on surfaces. It also isn't as effective as killing flies in drains, as it passes through the drain too quickly to do a thorough job.

The cost of pest control services depends on various factors, but the average homeowner pays around $175, with a typical range of $100 to $500. Your final cost will be influenced by the type of pest, the size and severity of the infestation, and the number of treatments needed.

Service costs also vary by frequency:

• One-time service: $300–$550

• Initial visit for ongoing service: $150–$300

• Monthly visits: $40–$70

• Quarterly visits: $100–$300

• Annual visits: $300–$550

For specific pest examples, getting rid of spiders typically costs between $100 and $300, whereas a termite infestation can cost from $230 to $2,500 or more, depending on the extent of the damage.

In a house, scorpions tend to live in crawl spaces, attics, in the nooks and crannies of closets and furniture, gaps under doors/windows, and cracks in your foundation. Outside your home, scorpions like to inhabit shady spaces, such as beneath trees.