In the episode where Spongebob and Patrick are going to Gloveworld, on the bus ride home, Spongebob presses his face to the bus window, he has a glove on his nose, but when he comes back up its gone.
What's the deal? This must happen a million times in one episode, the artists get lazy and don't want to draw a glove, I could give you twenty examples of this happening in one episode. This really isn't a bonafide slip up.