@catchtherainbow , David, Sony Cyber Shot, remove the battery, squirt a (little) 90% Isopropyl Alcohol under selection wheel and blow out/dry with canned compressed air. Repeat a couple time and this should clean out the dust/dirt from under wheel.
If this does not correct the issue button internal stops are probably worn and button assy. may need replace to correct. I will post a tear down guide if you wish to dig a little deeper into your device.
[guide|41954]