system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why won’t denatured alcohol act as a sanitizer?
gpt
Denatured alcohol (ethanol with methanol and pyridine in it) is just as good at killing germs.  But, it's also a little good at killing humans. Since hand sanitizer might get inside the human, particularly tiny humans, it's not a good idea to use denatured alcohol when you can use the non-poisonous version of ethanol instead.