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Mine began having spots immediately, even before I actually played. Just some air bubbles under protective sheet 🤷♂️My colleague uses B2P (I built his bat) and doesn't clean it, scrapes it, and generally doesn't look after it very well.
3 months of this, and it's still fine.
I honestly don't understand what people are doing to their rubbers, but neither the DHS nor any 729 rubbers in my possession have ever had these issues...