Share your experience with glass scratch repair.

I’m looking for recommendations for removing scratches from cell phone glass, and I’m interested in hearing others’ experience with different products/methods. I see a lot of liquids, gels and epoxy-type products available. Some with or without buffing. I don’t want to risk ruining the glass. I have a tiny little scratch on the screen that is just noticeable enough to be bothersome. It’s worth it for me to spend about $20 or less to remove, but not at the risk of damaging the rest of the screen. If there is a safe product that actually works, I’d like to get it.