The last time I had to steep a
juice because of an alcohol smell, I did 4 hours, put the cap back on, shook it up, still smelled it, took the cap back off for 4 more hours. Then it was fine, your results may vary, but I probably wouldn't leave it off for more than 24 hours, though I have no real reason to say that. It shouldn't degrade the flavor you're looking for, just allow the fumes to be released.