In a 6-quart Instant Pot, stir together the chickpeas, 2 teaspoons salt, the baking soda and 6 cups water, then distribute in an even layer. Lock the lid in place and move the pressure valve to Sealing. Select Pressure Cook or Manual; make sure the pressure level is set to High. Set the cooking time for 5 minutes. When pressure cooking is complete, quick-release the steam by moving the pressure valve to Venting. Press Cancel, then carefully open the pot. Using potholders, carefully remove the insert from the housing and drain the chickpeas in a colander; return the insert to the housing. Rinse the chickpeas under cool water, then return them to the pot. Add the garlic, bay and 6 cups water; stir to combine, then distribute in an even layer.