Need help removing lower spray arm

I am trying to remove the lower spray arm but no matter how much I turn the "screw" in the middle it will not unscrew. I’ve tried both clockwise and anti-clockwise, but it just keeps turning and never allows the arm to be removed. How do I get it off?

David

Hold the ‘screw’ in the middle with a pair of pliers, then try to spin the arm while holding the pliers stationary. I’m thinking it’s anti-clockwise to remove, but if that doesn’t work, try the other way. It should come right off.

Brian, that’s good info. I think I’ll try that delivery tube trick. That way I may be able to see what’s going on without destroying anything. I’ll report back my results. Probably won’t get to it 'til tomorrow.

David