I let them breath as was stated (24 hours). I also put my finger over the open top and shake throughout that time.
Then, I use a crock pot on the "low" setting for about 5 hours. Because of label loss, I put the closed bottles in ziplock baggies, only 2 bottles per and remove the air. It works in gaining about 10 days of steeping. Then they go into the cabinet awaiting me to finish previous juices. I get to the new stuff in about a week of 10 days.
So, for 10 days of steeping I get 2-3 weeks of steep. The crockpot just gets the process going.
I do have to say that different vendors sell differently (partially steeped/non-steeped) and I watrch for that.