I’ve been using some form of electric toothbrush since I was 6. This was a well intentioned call on my parents part, because I have terrible teeth, and the vibrating toothbrushes are significantly better at cleaning out plaque. But it takes half an hour for a *normal* sensory system to calm down after that kind of stimulation (source: my OT, who didn’t say where she got that number from). Who knows how long it takes children, or people with sensory issues. That kind of stimulation right before bed is the worst possible thing for my sleep, and might explain why it’s always taken me forever to do so.
I’ve switched to no-vibration cleaning at night, and vibration cleaning in the morning, and I’m sleeping a lot better.