How to ask if parents are smokers?

[apples and bananas]

I have one that never smells of smoke, but her backpack sure does. There are some days it smells up my entire front hall. It's not mom, it's dad. And I would have never known from the interview process as I didn't meet dad ahead of time.

I think this is a great question for the phone interview.

I would say something simple like this:

"We have a child in care that has a very strong allergy to scents. Can you tell me if there are any smokers in your home"