I stored my new one out in the garage. After two uses it was frozen stiff. I had to use a hammer and dowel to drive the cylinder out. Bronze corrodes too, and the ozidation is larger than the Bronze. This causes binding. Clean it off good - I'm afraid to use oil on it, 'cause it will get into the powder. A little graphite wouldn't hurt. I now store mine in the air conditioned house and only experience a little binding when I first begin to use it each time.
That first time it was in the summer and very humid in the garage. Perfect conditions for rust.