Security camera is out of focus and making a loud static noise whenever I check it on my phone

Hi! I have 2 cameras, the one in the front has been making a loud static sound everytime I open to check, and also the camera is out of focus.  Not clear, at all anymore.  Speaking to a rep I was asked to buy new cameras, these are only about 2 years old and I think that’s ridiculous for customers who have bought the whole home system.  Anyone else having this issue? Thanks so much in advance.