scrubbing the tub [365.15]

Way grosser than you might imagine, since:

1. it is right next to the litter box, hence the boys like to jump in it with their litter dust-covered feet, and

2. (unbeknownst to me until just awhile go) one of them threw up in it when we had them shut in the bathroom two weeks ago while our water heater was replaced.

We don't really use this upstairs bathroom, so we generally ignore it, but dudes, I have knitting to wash and block. And that requires a clean tub.