I really wouldn’t bother washing out the urine, just dilute it with water, if anything. Urine is high ammonia, yes, but it is also very high nitrogen, which is great for your garden. If your worm bin isn’t large enough or well ventilated enough for you to be comfortable putting the budding in the bin, then I would make an open pile on the ground, uncovered, and let the pile go through one hot compost cycle. When it cools, then feed it to your worms. They will love it, and will process it further for you, and you will love the beautiful compost resulting from their efforts. Note, you can tell if is aged enough to add by smelling it. The human nose is VERY sensitive to ammonia.

I plan on drawing up plans for this system soon, as it is the most efficient system I have made to date, and I have completely given up all of my previous bins and systems!

I had a snake back in the day so had a big bag of leftover hamster shavings I came across this spring. I decided to use it up in my worm bin to get rid of it instead of using the outdoor compost. It gave my worm bin a nice smell in the basement. It also didn’t affect my worms in any negative ways. I usually give them two handfuls every week when I fed them and it was almost as quickly decomposed by them each week.

I still remember the smell of dead worms after I add some (handful) of guinea pig waste+bedding. No, I didn’t wash them nor did I expose them and I even asked my compost master if it’s ok and she said yeah…but I got dead worms instead.