We love to use them. Those words are familiar and so we write them down. The problem is the cliche might say just what we want to say but those words ahve performed the same action for stories and stories. Look at the adorable baby. The moon resembled a huge wheel of cheese. There are a million cliches and they're used by writers again and again. Often a new cliche creeps into the language and suddenly it's seen in every story. One I've seen recently was "He brushed a strand of hair behind her ear." Some form of this was in everu romance I read for months.
Cliches just aren't used for showing pictures but also of showing a person. The tough bully. The tramp with a heart of told. I'm sure you know many.
When writing getting rid of cliches is a task that takes time. These darn things creep into every bit of the story. From settings, to actions, to people cliches are found. You may not get rid of them all but it's a good thing to try.
And remember if you're clever enough, you might just give the world a new cliche.