Anyone ever try Nokoma baseball glove conditioner?
I've used it on a couple of thirsty,old leather grips and it seems to restore the moisture and tack pretty well.
Cleans well, too, but it takes a long time to dry if you use too much.
Apply by hand massage, let sit, and wipe off the excess with a soft cloth. Repeat as needed.
My hands felt really soft afterwards, too.