I always leave a little water in it after cleaning it. Just like the regular toilet. So when he goes poop I remove the bowl, pour everything in the toilet, and flush it.
We used to do a little trash can liner for the poops and just throw them away in the diaper pail but now that’s she is doing most pees in it I just leave it how it is and do what @Valerie does 👍🏼 we use a second one in the trunk of car and still use the trash bag trick with a dog potty pad in the bottom to absorb the pee. Hope this helps!
We just dump it in the toilet, flush like usual, and then sanitize the toddler toilet bowl 😊 My daughter’s potty has a little removable bowl so disposing of the poop and cleaning it is pretty easy!