Recently when ive been turning, ive been hearing a metal noise in my door. It sits on whatever side I turn to. For example, If I turn left, then left again, it wont make a noise. but if I turn right, then left, it will make a noise both time.

Any idea of what can be loose? I plan on opening up my door sometime this weekend, but it would be nice to have an idea of what to look for

thanks ahead of time