Anyone in the habit of brushing their 1 year old’s teeth already?

You’d think I would’ve started sooner, being a dental assistant! But we give a bottle to my son while reading his bedtime story in his room. It doesn’t make sense to brush before, cause they won’t be clean anyways before bed... but it doesn’t make sense to go to the bathroom to brush his teeth after, cause he’s relaxed before bed after his bottle and story.

I’m so confused what to do!