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Important - Phlat ball may not open fully. This self-corrects as you play and it warms up.
Quick warm up: in the open ball position, place the Phlat Ball in direct sunlight for up to 15 mins.
Super warm up: WITH ADULT SUPERVISION, in the open ball position, run Phlat Ball under hot tap water (no hotter than is comfortable to the touch) for up to 30 seconds. Shake ball dry.