Suggestions for Disinfecting door knobs, handles, etc.

[Blueplanet]

20. Bleach weakens over time

https://www.thoughtco.com/chlorine-bleach-shelf-life-3976002

"Another way to tell if your bleach is expired is to note its odor. Don't open the bottle and take a whiff! The human sense of smell is sensitive to bleach, so you should be able to smell it as soon as you pour it from its container. If you don't smell any bleach, it's likely most of the product has decomposed into salt and water. Replace it with a fresh bottle."

I have noticed that in some of the cheaper bleaches there is no odor.