A quick search of using baking soda as a toothpaste will bring up some facts mixed with a bit of BS.
Sodium Bicarbonate aka Baking Soda is actually very, very low on the abrasive scale. Check the chart below.
Your fact finding mission on google may lead you to believe that using baking soda on the regular would be too abrasive.
Shockingly it is much less abrasive than everything except just using water. Even natural toothpastes and popular brands that add sodium bicarbonate come up much higher on the Relative Dentin Abrasive (RDA) value.
At some point you'll be wondering how to upcycle sunglass lenses or at least recycle them. Well here are some inspiring ideas that are all totally Pinterest worthy crafts. Gaia Guy bamboo sunglasses should last you a long, long, long time. All of it is zero waste and totally biodegradable form the bamboo sunglasses case to the organic cotton sunglasses pouch. What about those UV 400 polarized lenses? Well, these are a kind of plastic and that means either recycle or upcycle. I came across some nifty ways to upcycle your lenses and not just from your Gaia Guy bamboo...