Oooh...Be careful not to snap a handle (it happens with those rear-seal faucets).
Not sure what "took the handle apart, all is clean" actually means, but I'd disconnect the keg, remove the stuck faucet and let it soak in the hottest water you can get out of the faucet until it frees up. Then consider a complete tear-down, clean-out, and re-assembly...
Cheers!