Blurring in the rear window of my 2019 Toyota Avalon.
As long as there’s not something obvious spilled on the window, you’re under warranty have the dealership take a look at it. Another thought, are you using recirculate on your A/C?
The plastics/vinyls on new cars will “out gas” for a few years. It is worse in the first couple of months. It just needs cleaning, but it can be difficult to clean off. It takes a lot of elbow grease.
Do you mean it’s dirty, or do you mean it’s distorted? Hard to fix distort.
Are you sure the issue is with the window and not the rear-view mirror?