I've always lived in a filthy house. Never use much in the way of cleaning products. Babies crawled in the dirt, ate the dirt. I even took them outside to filthy places so they could be exposed. Very healthy kids.
A bar of soap lasts a year or so in our house
If we drop food on the floor we pick it up and eat it, after removing hair and/or wiping it on pants or shirt to get grit off it.
Even though we use laundry detergent we get the non-scented kind and use less than recomended.