Fixed sticky key on MacBook Pro 16 inch 2023
Long story short, after reading about "take the MacBook to a service center" (two hour drive), about watching video of cleaning with alcohol cotton swab, about spraying with canned air, about prying up keys with a butter knife or a guitar pick and being careful not to break the little snap together parts that fall out when you do so, I chose "None Of the Above".
I chose vacuum -- I was very careful not to suck up keys or key parts. I put a piece of tulle fabric, doubled, over the hose of the vacuum and attached the vacuum brush. I shut down the computer and carefully brushed all the keys, up and down, left and right. The key became unstuck. I could tell by just tapping on the key. When I took out the piece of tulle, it was covered with bits of lint and other tiny stuff.
MacBook Pro 16″, macOS 15.3