This electric toothbrush promotes better brushing habits
5:07am PST - November 22nd, 2019 black christmas - MashableTL;DR: The Oral-B Smart 4 4000N electric toothbrush is on sale for £44.99 on Amazon, saving you 65% on list price. Nothing can escape the clutches of the Amazon Black Friday Sale. You might think the shopping event is all about expensive TVs and laptops, but …