We used an old sock stuffed with oats for a while for Benjamin's baths. Regarding getting wet oats off of cloth (yes, I agree - no fun!

) but I actually "dunked it" in the toilet like I do with soiled nappies and the oats came off quite nicely and just flushed away afterwards!

Then I just rinsed the "slime" off under the tap and threw it in the nappy bucket with nappies, and it came out perfectly clean in the end. However, I have to admit that I've more recently been too lazy to do that, and just used his Aveeno bath oil.