Don't ever leave food or trash out. All dishes done each night. Trash OUT each evening. All food, like cereal,, cookies or pasta in sealed plastic or glass containers. If not, keep it in the refrigerator. Counters clean, no crumbs... same with floors. This has worked very well for me.
Very easy! Boric Acid! You can buy the Harris Boric Acid Tablets! You won't have them anymore!
Boric acid or diatomaceous earth. Sprinkle around appliances, under sinks and around door jams.
We have had good luck with a mixture (50/50) of boric acid and sugar, the sugar draws them and the boric acid kills them. Expect to see an increase at first because they cara coming out to feed.