Spiders tend to prefer places like basements crawl spaces upper corners of rooms and attics as well as sub floor air vents.
Floor vents and spiders.
One solution to this problem is installing insect screens on your indoor and outdoor vents.
Many spiders prefer dark areas and will hide in cracks to retreat.
If there are particular areas that you have noticed spiders hanging out make sure that you spray them as well.
Air vents are the number one way for bugs to get in.
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Pay attention to these spaces when planning your defense original source.
Feel free to spray spiders directly if they come across your path.
Take preventative measures outdoors to keep the spiders from coming in.
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Replace or fix torn window screens and caulk up gaps around.
Some vents are vertical and it is difficult place a trap inside for these types what i sometimes do is place wide strips of clear packing tape over the vent leaving thin slits 1 4 to 1 2 inch wide so that the air can still come through but when the insect tries to crawl out to freedom he will get stuck and die.
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Spray the spider solution along all entryways to your home including doorways window sills around a fireplace baseboards and vents.
Seal up your home to keep spiders from entering through cracks and crevices.
If you re seeing small insects and spiders in your house there s a good chance that they crawled in through a duct opening.