That one question I wasn't allowed to ask David Beckham

Do you remember that I went to London a while ago to meet David Beckham? He is the fresh ambassador of Bowers & Wilkins, yes, our David is filling his piggy bank nicely, and that’s why I got to peek at him from a very small distance and even take a photo together.
I was also allowed to submit three, yes three whole, questions that I would like to ask David. In the end, the interviewer made a selection from all the questions from all the journalists. Understandably so, it was an incredibly beautiful conversation about music and the role it plays in his life.

But I was tapped on the shoulder a few times during the evening by people from Bowers & Wilkins who said: “Were you the one with that one question?”
So you understand that there were a lot of satisfied L’Oréal-because-I’m-worth-it-worthy hair flips waved over my shoulder. Because I was quite pleased with my question myself. I mean, what do you ask someone who has been interviewed 738,000 times?

This was it:

In your amazing Netflix documentary there were many confessions and one of them struck me and my women-friends most. The idea of you cleaning the candle holders when the rest of the family was asleep catapulted you even higher in our ranking. I never succeed in cleaning those candle holders, what is your secret and cleaning tip?

I liked it. But unfortunately, I still have no answer. Any tips from you? Anyone? David, help me out.