notes from sensei: https://www.youtube.com/watch?v=_t6WxPOppd8
In a large bowl, mix the salt, baking soda, and salt. Add the beans and soak overnight. Drain, rinse, and cover with fresh water by 2 inches for cooking. I salt the cooking water at this point (about 1 Tbsp Diamond Crystal Kosher or 1.5 tsp Table salt), but if you are sensitive to salt, you can wait until closer to the end of cooking.
Pressure Cooker High Setting
salt the cooking water generously
(in the video, I made a mistake and called for 8.5g salt)
Put the beans, water, and salt in a pot that can maintain 195F (+/- 5F is fine). My old Instant Pot Duo could do it on Slow Cooker High setting. My new Instant Pot Pro does it on Sous-vide 190F setting (it’s not really 190, it’s 196 :) The first time you do it, check the temperature at 2 hour intervals. You don’t need to watch it for the whole cooking time. If it’s doing well after 2, 4, and 6 hours, it’s likely to continue with the correct temperature.
Cooking Times at 195F: