The first Hammer I got, a No Mercy, died on me after 100 games. However, I almost never cleaned it (I'm an idiot) but after I had it resurfaced and put through the Hook-Again it's been like new for my father ever since. Go-to ball for him on heavier oil, and he makes sure he cleans it after every set.
None of the other hammers I've bought (Toxic, Bite, BWS) have had the issue since I cleaned them immediately after each set.
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Arsenal:
Black widow Bite
Raw Hammer Toxic
Ebonite Bash
T-Zone