So im brewing hard kombucha. After calibrating the tilt meter to the app, i get a refractor meter reading and dunk the hydrometer in the tank. After a couple of days, my SG wort went from 1.051 to 1.015. Of course i double checked it and clearly was off. I had recently changed from using water in my airlock to vodka. Do you think that can be the factor? I’ve never really had this issue until now.