I find multi-blades pull painfully and use the cheapest Bic single-blade disposables. However, these now blunt after about 20 shaves whereas they used to last for months on end. I assume this is what is known as value engineering, or "make 'em buy more often". It is what used to be said of nylon stockings, when the early ones were found to be virtually indestructible. It seems to apply to most cars, HJ reckoning that 7 years is their economic life.
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