well, in our grandmother's time...
Our grandmothers lived in mortal fear of germs, this isn't a new thing. In the past the idea of letting a germ sneak past your cleaning methods and infect your family was horrifying to any housewife, women who didn't keep their home spotless were considered slovenly and lazy.
My grandmother used to use scalding hot water for dishes, each dish wash scraped, rinsed in scalding water, washed in one side of the sink, and placed into the other side of the sink in more hot soapy water. When all the dishes had been washed the first time, she would let out the first wash water, refill that side of the sink with scalding hot rinse water, wash all the dishes again, rinse them, then the pans were dried with a spotless towel, and the dishes and glassware allowed to dry on a scrupulously clean dish rack which was bleached overnight once a week.
Laundry was just as intense, work clothes from the farm were pre rinsed in warm water, washed once in warm water with Murphys oil soap, then again in hot water with all detergent, then double rinsed in warm, with a splash of brown bottle lysol in the first rinse, and a capful of downy in the second rinse, then hung out in the hot sun to dry.
Regular clothes weren't treated quite so harshly, but they were still washed in the hottest water safe for the fabric, and double rinsed, whites being dosed with bleach and everything else dosed with lysol, all except for the finest fabrics.
Then everything was ironed, to keep it looking presentable, and to annihilate any poor unsuspecting germ she had possibly missed earlier.
As she got older, got an electric dryer, and we left the farm, she relaxed somewhat, giving up adding lysol to laundry, no longer ironing anything unless absolutely necessary, but she and ladies of her generation are still far more concerned about household germs than most generations before or after.