Ah. I've been using the packaged 20 mule team borax (I forget the name of the product, and I don't want to unwrap the box to check). Saw my first cockroach of the season yesterday. It's been a long time since the last one. They chill my soul.
Had them in my first so called apartment, a tack on place to a duplex (the one with the playboy bunny of the year next door), and moved because of the roaches, forty years ago.
To explain, I don't think I can keep them out of my house without a kitchen re-do, undersink cabinet mess, and I can't do that now. Lately I've been winning in the As-Is war.
Back to apples.