Hammer is by far the worst company with oil absorption, Storm/Roto is in the middle of the pack, Motiv is the best by far. However, one huge factor I've found is use of a Shammy. Doesn't matter which company, all Shammys are the same. Use of a Shammy dramatically reduces oil absorption because it gets it all off the ball unlike conventional or even microfiber towels which really just smear it around. Rejuvenators are also not nearly as effective as a Detox. We did our own internal testing, and all a Rejuvenator does is heat the ball up which heats the oil up so it will leak out. The Detox actually extracts the oil, so a Rejuvenator not reviving a Hammer ball is not surprising in the least.