I was embarrassingly old when I realised we’re meant to “glide” an electric toothbrush over our teeth rather than scrubbing with it.

We’re also meant to floss deeper into our gums and wait much longer to use mouthwash than I realised.

Since learning about the techniques, though, I’ve had a much more thorough dental routine.

Except, it turns out, I’ve been making what dentist Dr Mark Burhenne, known online as Ask A Dentist, calls “the biggest mistake” most of us make when brushing.

Brushing too hard is “probably” the biggest mistake most of us make

In a YouTube Short, Dr Burhenne said the error lies in our grip.

“We are holding [our toothbrushes] like a hammer or........

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