You know you've got a cliché when you see the exact same line in another book.
I was reading a free first chapter of A Better Place, by Mark A Roeder, when I came across this sentence: "Every girl wanted to be his girlfriend and every boy wanted to be him." (Roeder, Kindle locations: 54-58). Yeah, I know, I've heard this sentence before, in a movie or somewhere, but it just really shouted at me when I saw it in print. Luckily, I had already cut that sentence from my manuscript.
Have you seen a cliché sentence in a book you've read that you recognized from your own manuscript?