Exposure to germs makes you stronger.
Cleanliness fetishes don't make you healthier. Paradoxically, reducing your exposure to a little bit of everyday life cuts down on your antibody-building opportunities, making you weaker and thus more prone to sickness.
In short, you are your own worst enemy and very possibly a first-class loony.
"God made dirt, and dirt don't hurt".
-my great-grandma
Some of the healthiest cultures on earth are the ones where there is very little space between the outhouse and the food prep area. Believe it or not.