Got a metal front door with Lockmaster lockset. Has two slide out flat bolts on the long edge of door as well as one operated by key in the middle of handle. Handle up/down became rough a few days ago, and tonight I got in but when I attempted to open the door later it appears the bottom deadbolt is not retracting. Door jammed shut. (although actual lock itself moves and works fine). Any ideas apart from hacksawing off the bolt and getting a new lock?