Sorry for the lack of pictures. This process just isn't that interesting. The results, on the other hand, are fantastic.
Pour the apple juice into a giant microwaveable container and nuke it for about four minutes.
Pour the heated apple juice into a crock pot.
Add the allspice, cinnamon, and cloves. Mix very well.
Pop on the lid, turn the crock pot on medium heat, and go do something for at least thirty minutes.
I left mine on for two hours and it did fine.