Hi NakkaliMaiya: Home Remedy for Roaches, got this information from Internet. Get Boric Acid, yes that boric acid we play carom board. Visit Walgreen pharmacies you will get enough for $5 to kill all. Direction and how it works: Spray all over the possible places they can hide and colonized. This will be the best shots than roaches bombs and foggers because it works slowly and has lasting results unless you bring in them back. While they walk on boric acid they carry some to their home and will kill their eggs which will stop new generation and they will be eaten by acid. They Left over can pass to your overnight visitors because they might have bring some roach's eggs to their home. Keep dusting/spraying until you see them running for food. One last question: How is your kitchen ? Who is responsible for tidyness? Share shore and keep it clean. Specially underneath the sink. Keep it clean other wise you may ended inviting rats too.