Buy some Pepper bird seed. I mix it 1/2 and 1/2 with the regular seed and haven't seen any mammals at my feeders since. You can buy it at Wally World...
Moultrie has rebuilt cams for around $45. I just got another 2 from them.
https://www.moultriefeeders.com/products/cameras/refurbs?gclid=CjwKCAiA4veMBhAMEiwAU4XRr6Fe80IYrrumwAdit6RQYin-P1vIf-RMWXdTvnytIKoYUTn7U3c_rxoCHm0QAvD_BwE