Spray it for a couple days as others have suggested. I have had success by hitting at the ratchet handle with my fist, in the clockwise direction first, and then do the same in the other direction. I usually do this 2 or 3 cycles before actually trying to turn them out. They should come out repeating this process, the flats and threads are not that fragile, you can put some pressure on the ratchet, I would just stay with the bang bang cycle back and forth if a reasonable amount of effort doesn't get them to start turning.