Day 14
I've mixed ingredients not crushed enough or crushed too much, a faulty cauldron, wood chipping off into the cauldron, even an unusually large sneeze due to some dust coming off a book. I've also made two excellent leaps ahead in developing it without magic. But it's still a touch temperamental. I'm working on the balance.
24 hours. Fortunately, I get my sleep each night. And I always wake up the same time, so I go to bed accordingly. It beats Sam Winchester's time loop back in his universe. No sleep. And his brother died every day.