Why does a bar of soap produce a great lather when it’s new, then not at all when it’s smaller?

Question

It’s supposedly the same soap through and through, all the way to the core of the bar, right? Why does it react so differently to water and being rubbed on skin when it is reduced to a sliver?

In: 718

Answer 1

I had the exact same frustration but then I switched to Kirk’s Castile soap. In my moderately hard water it will lather nearly as well when it’s a sliver as it did right out of the wrapper