I think with poop it's pretty obvious. But I am wondering what do you do if the baby pees?
It happens to my LO(3M) a couple of times that he pees towards the end of the bath time. I kind of ignored it and proceeded to dry him up without refill the water and rewash him. Because then I would have to drain the old water to refill the fresh water and it would take some time, longer than the LO can endure. But I also feel a bit guilty if doing so.