[NegativeLatency]

Yeah the bristles wear out after use, cool images of new vs used from an electron microscope: https://youtu.be/cwN983PnJoA?si=2M0XEvND_VDqfcKO

[jbverschoor]

Toothpaste is grit 600-800 omg that's really rough, but it's Colgate and I know that's very abrasive. I just never knew the equivalent in grit.

I actually use a toothpaste with low RDA (abrasiveness) of 40-48. (VITIS)

List of RDA values: https://www.familydentisttree.com/abrasive-toothpaste-whats-...

[SergeAx]

Philips and other toothbrush manufacturers should somehow include this imagery in their marketing materials about why you really need to change the brush every 3 months.