MacBook screen deterioration

lengdahl wrote:

Is there a fix for my MacBook screen? It looks dirty but it is not, it is all mottled and difficult to use in sunlight

Sounds like a case where the anti-reflective coating is peeling off...

Call Customer Support (800) MY–APPLE (800–692–7753)

or on line https://getsupport.apple.com/

or call AppleCare Support at 1-800-APLCARE (800-275-2273)

Outside the USA—Contact Apple for support and service by phone

See a list of Apple phone numbers around the world.

https://support.apple.com/en-us/HT201232