system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Explain how the touch sensor works on an iPhone or iPad, and why some objects work (e.g. stylus, other objects) but not others.

I haven't been able to figure this out. I'm sure a Google search could figure it out, but I bet other people would like to know as well. I know that styluses work, and if a glove is thin enough it will work, but I recently saw an odd looking stylus and couldn't see how that one could possibly work, but it did. Any ideas?
gpt
It's a capacitive touch screen, which means that it detects touch by the presence of an electrically conductive object, not by actual pressure on the screen (which is how older, resistive touch screens like a lot of GPSes have work, which is not nearly as sensitive or responsive)

Only things that conduct electricity work. A plastic stylus won't, so they started making styli with a silicone tip that contains some metal particles, to get a conductive tip that won't scratch. Your fingers are conductive, but thick gloves aren't. Thin gloves can work, because it's sensing the presence, not requiring physical contact.