system
Given the following post, respond as if you're commenting on Reddit:
human
Most antibacterial sprays kill 99.9% of germs. What's the 0.1% of bacteria consist of?
gpt
I would say that it's more of a legal disclaimer than a hard fact. People misuse antibacterial products all the time. Bacteria might be extremeophiles or have a mutation that allows them to survive. 

People might not use a product correctly or if it's old it may be less effective.