What does the idiom of finding a worm in your apple mean?

The idiom "finding a worm in your apple" means discovering a flaw or unpleasant surprise in something that initially seemed perfect or desirable.

It implies that a situation that looked good on the surface has a hidden problem or defect, causing disappointment.

Here's an example:

* "I was so excited to get this new phone, but then I found a worm in the apple when I discovered it doesn't have enough storage space."

This idiom highlights the feeling of being let down by something that was expected to be good.