Bars of Soap seem to be infinite for washing yourself.

[Dachre]

I've noticed an issue with bar soap.  When washing yourself at a water source with the soap present in your inventory, the soap will be consumed, but not completely.  A pixel or so of the soap's "remaining" bar will never disappear, no matter how many times I use it; and even with such a small quantity present, I still receive the speed bonus for self-washing.  I've been using the same one pixel of soap for about three in-game months now, and it's never consumed.

 

Unfortunately, I don't have any more concrete data to provide, only anecdotal data.  I've washed both with the sliver of remaining soap, and without, and it is, indeed, significantly faster with the one-pixel soap sliver present.  I've washed with minor body dirt, and with major, week-long body filthnastiness present.  The last pixel of bar soap seems to be infinite, but remains effective.

[Toshis]

man, i wish i had such soap in real life. No more need to buy soap.