Sorry, that is SO not the technical term for it but that's the sound my rear cassette makes as I shift up. It sounds like the cassette and can't figure out why it's making that noise. I gave it a very thorough cleaning last weekend and lubed it before I went for a ride this week. But since that cleaning it's started making that noise. I used the Park Tool chain cleaner thingy for the first time so am not sure if that had anything to do with it? Help!

Thanks in advance!