Blade,
I'm not sure of what the expected longevity of an Aggression is, but I would suggest soaking the ball in hot tap water with dawn or some other de-greasing dish soap. Let the ball sit completely immersed in the water for around 15 minutes, then wipe the ball clean with a light-colored towel. Repeat this process until you wipe the ball and notice that little to no more oil is coming off. Once you've done this, I would clean the ball (by hand) with a liquid soap containing pumice, such as Go-Jo, or Fast Orange. Not only do they also take out oil and grease, but they also are abraisives, which will take the surface down for you. You might even consider deep cleaning with a green scotchbrite while using the pumice soap. I've done this to several balls and it is a great way to make sure that all of the oil is out and that you have fresh surface to work with. This process is cheap, quick and it should allow your Aggression to come back to life. However, you may also want to invest in a product like Doc's Elixir after you've cleaned it. From my experience, if the problem you're experiencing is because of oil soaking in, it seems like it happens faster and faster as the ball gets older. Applying such a product should slow this occurence down. Good luck and best wishes in getting your reaction back.
Gene J. Kanak
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Bowling is without a doubt the dumbest, most pointless, most idiotic excuse for a game that has ever been invented. So, what time are we bowling tomorrow?