justcyborgthings:

tilthat:

TIL disinfectant doesn’t kill 99.9 of the amount of germs, 99.9 percent refers to the variety of germs.

via reddit.com

More importantly, it refers to a particular set of germs that this disinfectant had been tested against, and that some disinfectants only work against 2-4 different types of bacteria. Yes, this includes alcohol and bleach. Yes, I feel betrayed too.

Lucky for you, the strains these work for are supposed to be listed on the bottle, so you can pick the disinfectant based on the setting. The source gets into this more, of you’re interested.