Update: got in contact with Garmin and they sent out a refurbished unit for free! They were a bit surprised that my 235 hadn't even made it past 2 years of use.
Amazon.com: (Pack of 4) Tempered Glass Screen Protector for Garmin Forerunner 235 225 620 220, Akwox [0.3mm 2.5D High Definition 9H] Premium Clear Screen Protective Film for Garmin Forerunner 235 225 620 220 : Electronics