So I cleaned the inside of the Instant Pot after unscrewing the bottom, emptying out all the burnt over dried up soy milk crud, and scrubbed clean the sensor bars. I aired it out overnight. Then I put the bottom piece back in and screwed it in. I ran a 5-minute water pressure test to ensure the pressure was building up properly. And it worked! The glue to seal the sensor screws has arrived, so I will be gluing them soon and will let it air dry before using the Instant Pot once again.
Phew. I hope this keeps up and this isn’t a false sense of security. I never want to see that awful C6L error or any error on my beloved Instant Pot ever again. I NEED my Instant Pot! It’s an integral part of my kitchen and cooking!