Go to Gander Mountain & pick up a can of Ballistol. Treat one side & rub it in good. Then do the other side. This stuff is the real deal. It was designed in Germany for leather treatment & as a gun cleaner & lube around the WW-1 era.
IT WORKS! Ballistol has a great web site ballistol.com, so many things it works on!
And "NO" I am not paid to say that, I just really like the product!

Slawman