Bed bugs already survive what's on the shelf.
Here's the part nobody at the hardware store tells you: over 80% of U.S. bed bug populations are already resistant to pyrethroids — the exact chemistry in almost every store-bought spray. You're not treating an infestation, you're misting it with something it evolved to ignore.
VA88 doesn't poison a nervous system. It kills mechanically, by destroying a physical structure the bug can't adapt around. That's the whole game.