It’s also one of the most obvious clues that trips them up, because chlorine bleach is seldom used in those settings in normal, non-criminal circumstances, and because it does not clean up nor hide the substances that investigators look for when scouring the scene. Lastly, the amounts of bleach used at a scene is also ridiculously overkill. (Sorry for the pun.)
For instance (and assuming that you are not a criminal), when was the last time you used chlorine bleach to clean anything in your car?