My bird has started forming tiny bubbles in upper left corner of the screen. Anyone had this experience? What should I do to prevent more or replace the screen?

I have seen this on the outside and it was due to over spray from sunscreen or insect spray. There is a chemical reaction that happens plastic/spray that will do it as well as leave little craters in the screen sometimes.

I had a guy with over spray in one of my past boats that got on the engine and pretty much made it have a 1000 spots.

Not sure if yours and mine were the same.

If not then just a heads up on sprays and their effects on stuff. Be careful where the over spray lands. No way would I put that on my skin after seeing what it does to plastic. LOL

that happens to a lot of their 997/1197 units. Mine had a bubble around the hole screen. Don't worry about it unless it keeps you from being able to see information on the display.