Yes it is labor intensive, but that was one of the early ways that could be done at home to more effectively & safely remove oil that was came up with when it was found that removing oil helped restore ball performance.
If the "rotating" your referring is what you seen in the Morich article, That's about the Revivor oven. It has a motor that rotates the ball over wiping pads as it de-oils to help remove the oil that appears on the surface of the ball.I'm not sure rotating the ball would be much more effective than the dehydrator. There is already super air circulation the way these are built..
A lot Home DIYers do something similar by pulling the ball out and wiping it and then putting it back in.
After an hour, there wasn't much oil left on the surface of the ball, either. I think a lot of this comes down to there being more than one way to skin the proverbial cat....
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