I noticed this with several of my poly or poly hibrids. 1st time I play with a fresh poly string, even if it's Alu, my arm feels great, balls go in, everething is fine. But the second time I play with them they start feeling harsh. Now I don't understand, if they lose 10 pounds in the first 24 hours, plus what they lose when I play the first time, then how come they feel so damn stiff the second time? They should be looser right? Then?