How to Spray for Spiders | Target Webs, Cracks & Entry Points

When you find a spider indoors, the instinct is to spray the bug and move on. But that leaves egg sacs and hidden stragglers behind. The effective way to spray for spiders is to target the spider itself, its web, and the cracks, dark corners, and entry points where spiders hide. Here’s the practical method.

The Right Way to Apply Spider Spray

Start by shaking or preparing the product according to its label directions. Then aim at the spider and its web, followed by treating nearby hiding places like cracks, dark corners, under sinks, behind appliances, and around doors and windows.

Many official product labels direct spraying around door and window frames, both inside and outside, to reduce entry. Treat baseboards, wall voids, storage areas, attics, crawl spaces, pipes, drains, cabinets, and furniture edges, as these are common travel routes and resting spots. Spray until surfaces are slightly wet or evenly moist, not soaked.

Most spider sprays are ready-to-use, but labels differ. Some specify using a pin stream or short bursts into cracks and crevices rather than broad room spraying. Whatever pattern your label says—fine spray, stream, or pin stream—use that exact amount and method.

After You Spray: Timing and Cleaning

You’ll want to clean up webbing, but it’s worth waiting first. The spray needs time to work on the insects and spiders caught in the web.

Let treated surfaces dry completely before disturbing webs or returning stored items. This keeps the product effective and prevents contact with wet pesticide.

Safety and Compatibility Details

Keep spray away from food, food-contact items, people, pets, and plants. One EPA label explicitly says do not spray on plants. If your product label lists other pests alongside spiders, use only the application method written on that specific label, since directions can differ substantially even among “spider sprays.”

Some products are meant only for certain indoor surface uses, while others target spider mites on plants. Match the product to the job: read the label’s site list before you spray.

A Better Plan: Prevention Over Spot-Spraying

Spraying kills what’s there, but prevention keeps spiders from returning. Combine your spray treatment with these habits: seal cracks around doors and windows, keep firewood and debris away from the foundation, and reduce clutter in garages and basements. Outdoor perimeter spraying around entrances, windows, porches, and foundations helps cut the number of spiders that find their way in.

For a quick, reliable solution, our tested roundup of the best spider and bug sprays for home use cuts through the label confusion and points you to products that work.

If you’re dealing with an ongoing issue, reapply according to the label’s interval—usually every few weeks during peak spider season.