From the article:
But for the general public, the implications of the study are simpler. “A microwave is not a pure, pristine place,” Porcar says. It’s also not a pathogenic reservoir to be feared, he says. But he does recommend cleaning your kitchen microwave often — just as often as you would scrub your kitchen surfaces to eliminate potential bacteria.
Don’t use antibacterial cleaners for general cleaning. Especially not hand soap. All you’re doing is breeding a master race of resistant bacteria in your home.
Yes. Use plain non-antibacterial soap. Or bleach if you want something stronger.