The solar panel on my fish feeder is kind of milky white. Does the sun still get through it to charge?

It’s possible it’s time to change out the solar panel.

If you have a volt meter, you can pull the terminals and put them on a volt meter and see what kind of readings you’re getting (make sure to do it on a sunny day!). On the Mounted Feeder, you should get 6v. On the Floating Feeder, you should get 12v. If you’re not, it’s time to replace the solar panel.