Yep, it's Hall Monitor.
#28
(images aren't working tonight)
Another one of those "good jokes, weak plot" episode. The concept is creative, but the plot is lacking a bit. However, it's still an entertaining episode. I loved how Spongebob was wrongfully convicted as the "Open Window Maniac" and scared people away. Also, for some reason, the mailbox joke always cracks me up, and I have no idea why. However, I did think Spongebob took it a bit far at times. Even so, it was an entertaining episode with an only okay plot, and some funny jokes. Also, Mrs. Puff gets arrested for no good reason, which brings it down a few points as well.
Hint for #27: The most important ingredient.