"Self-cleaning" doesn't mean no maintenance is required ever. And built-up gunk has a huge impact on performance.
Body odour has a reputation problem. It is often treated as a hygiene failure or a social offence. In reality, it is biology at work, plus a big helping of culture.
You know that pitchers run the risk of blowing out an elbow ligament. But who would have thought they could lose a rib?
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