I can think of two valid reasons for using them:
1. Establishing a Character.
People speak in clichés. It's a natural thing. While I don't think that means you should fill your characters' dialogue with clichés, you might use them to establish a type of character.
- An old granny who has a proverb/idiom for every situation.
- A ranch-workin' cowboy transplanted into a New York boarding school.
- A Budda monk who lives in a monastery on top of Mount Kismet.
- A parent arguing with a teenager who missed curfew.
You get the idea. The clichés they use build their character---show us who they are---place them in the world of your book. Still, the clichés should be used responsibly. Be sure they build up your character, rather than pull the character into the quagmire of overuse.
2. As Irony or Humor.
When you are using a cliché with the specific purpose of mocking it, I think it works. Clichés can be a lot of fun to play with. And because they are so well known (you know, from being overused), they make good joke bait.
For example, in Sorcerer's Apprentice (you have seen this movie, haven't you?), they use a plot cliché (namely Jedi mind-control) so the bad guy can get the information he needs. So just when I'm thinking, Huh. That reminds me an awful lot of Star Wars, his apprentice, the comedic sidekick, waves his hand and says in a mock-serious voice, "These are not the droids you are looking for." Okay, so maybe you have to see it, but it totally worked. Because they made a mockery of the cliché, I not only forgave it, but now think it's one of the best parts of the movie.
A word of caution: even though clichés may work in such situations, we need to be careful not to overdo it. What is funny once can fall flat the second or third time.
To end this series, I want to recognize that clearing out clichés that have crept into our writing is never easy. It takes work and effort. It often requires thinking outside the box. One of the best resources I know of to help your mind envision the possibilities is The Bookshelf Muse.
On the sidebar of their blog, you will find a wonderful assortment of Thesauruses: Setting Thesaurus; Emotion Thesaurus; Colors, Textures and Shape Thesaurus; and a Symbolism Thesaurus. Angela and Becca are nothing if not thorough, and they are constantly adding entries. I highly recommend you visit them for help with conquering clichés.
Again, I don't claim to be an expert. Hearing others' opinions and ideas is always good. So in the comments, please feel free to share other situations where you think using a cliché would work, other resources you know of to help conquer clichés, and any differing view you may have.
If you missed the first 3 parts, feel free to follow the links:
Conquering Clichés, Part 1: Introduction
Conquering Clichés, Part 2: Ways to be Cliché
Conquering Clichés, Part 3: Why We are Cautioned Against Them
Conquering Clichés, Part 4: Using Them . . . or Not