How do you spell hair dew?

Hair dew is not a standard English word. It's a combination of "hair" and "dew."

If you're referring to the moisture on hair after a shower or from the air, you could use:

* Hair moisture

* Damp hair

* Wet hair

* Hair mist

If you are trying to describe something specific, please provide more context, and I can help you find the best word to use.