little beetles or big beetles? are there alot of wood shavings around where the beetles are--- up in wood framing, flooring,joists; shavings-sawdust dropping down? new wood or older wood?
Crickets? Or beetles. How about using chickens? Cats?
Call a pest control company.
The best consumer fumigator is this Raid Fumigator. It is not a normal bug bomb.
You’ll need to break their reproduction cycle and stop their food source, also.
To do the first, you’ll need to re-fumigate in 7-10 days.
You must leave the house & you must cover up things that will get exposed to the vapors, like toothbrushes, toilet paper, etc.
Open all cabinet and closet doors. Pets & plants outside, for 3 hours, minimum.
You’ll have about 40 seconds to place the fumigator cartridge before it starts.
This product is so good, it kills rodents & most termites.
$14 for 3 cartridges is cheap compared to a pro.
I buy mine at Home Depot it Ace.
Here’s the pic
I agree you need to fog, Use a bug fogger. This isn't the most natural way of killing bugs, but it can sure be effective. Get rid of clutter. Bugs, such as spiders, thrive in cluttered places, especially in basements.