Why are you cleaning them? Just refill them with the same juice.
I don't know how you COULD clean them ... but remember don't do what I did. I mixed Draino, baking soda and vinegar together to clean some cartos and blew out the south wall of the kitchen. My wife was HOT!!!
Then I had to go out at 2:30 in the morning and borrow some materials from my neighbor to fix the wall with and came this close to getting shot with his shotgun. He did kill two of his chikins though, so I picked them up and took them too.
Made a nice breakfast.
omg! i just spit on my screen...lmao!!!