Will Borax kill flea eggs?
Not the eggs but it will kill the hatched fleas. If you spread some 20 mule team Borax laundry soap under your furniture and against walls and leave it your fleas will get sick and die. Vacuum up after the fleas are gone. It can take 2-3 weeks. It only kills indirectly. It kills the bacteria in their stomach and so they starve to death. You will see after a few days that the fleas become weak and slow, easily crushed before they jump anywhere. Then you will see small and slow and weak baby fleas . Then they will be gone.
