The brakes began squeaking when I apply the brakes

The brakes began squeaking when I apply the brakes. I have checked the pads and they are still over about half unused. I have used disc brake quiet on the back of the pads and shims. I have tried the pin lube on the back of the pads and shims. Each time I do this they stop squeaking for about a week then start again. Anyone have a clue why this is happening? Do I need to just replace brake pads and shims with new pads that come with the rubber shims??

Thank you