The keys don't return, all jam up.
I have an old, 1950’s manual typewriter, hasn’t been used in years. I have sewing machine oil, but I don’t know if I should use that or just spray WD-40 at the thing. I know in oiling any moving parts should be oiled but that’s all I know. When I depress a key it stays there and doesn’t return.
Is this a good question?