They do. I've replaced ours twice in 15 years of ownership (and have 3 more replacements in the junk drawer, since they came 5-for-$10: ASIN B07Y7S33RF).
It's a pretty elegant design. Unfortunately, a lot of people (including my wife, initially) would be prone to concluding that the whole unit was “worn out and needed replacing”.
It's a pretty elegant design. Unfortunately, a lot of people (including my wife, initially) would be prone to concluding that the whole unit was “worn out and needed replacing”.