Mix bleach with some common household bathroom cleaners/strong urine/ammonia and you can produce toxic chloramine gas particularly harmful to lungs of children, vulnerable people or pets. Other effects of this gas including burning eyes and sickness.
Mix bleach with commonly used kitchen chemicals or soap and you can produce mustard gas, this stuff was and is used as a weapon of war, need I say more.
Mix Bleach with organic matter and you can produce chlorfilm, a carcinogen linked to cancer.
The list goes on. So please stop using bleach as there are plenty of alternative products on the market which will often deliver you better cleaning results and remove the same amount of bacteria.