I removed the battery again and took a closer look at the keyboard. It's definitely melted plastic rivets holding it to a plastic framing that everything else screws into. I really don't want to start cutting into plastic. (here's a video of someone cutting and glue-gunning in a replacement: https://www.youtube.com/watch?v=tUnwW1mQ6aI) It seems like a few places sell the casing with the keyboard (https://www.ebay.com/itm/US-keyboard-for-Asus-ZenBook-UX305CA-UX305FA-Dark-G...) so I'll look around and see who best to order that from. There's so many models and sub-models that I need to be very careful with which one I order. I tried calling ASUS to see how much they'd charge for a repair and they want a whopping $540 to just replace the keyboard.