If spraying outside and in your crawl space will do any good then buy some Tempo and spray it. I would not use it inside the kitchen, maybe in a bedroom but just around the baseboards.

I know spiders aren't ants, but I sprayed outside and under my house with that a few years ago when having a sugar ant problem. I later called an exterminator. I told him what I had sprayed and he told me it would be a waste of his time and my money if he came out because he couldn't use chemicals that strong.

Tempo is some BAD stuff. Use with caution. It is used in unoccupied poultry houses to kill Darkling Beetles. It kills everything. I got over exposed to some undiluted Tempo powder about 20 years ago and if I get close to it now, it gets my allergies all screwed up.

If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then will I hear from heaven and will forgive their sin and will heal their land. 2 Chronicles 7:14