Puppy's seem to learn from example. The first thing that some of them learn is from their momma eating their poop when they're babies. It's natural for the momma

to clean up after them. Maybe if you're washing him every day he learned from you that it has to be "real clean". You might want to try and let him take care of the cleanup

for awhile and only clean it if he seems not to be doing a very good job. You're doing fine. Good Luck, he's such a precious darling.