Cleaning leather can be a tricky proposition since the very act of cleaning it may often damage the leather. This is especially true of some cleaners that use harsh chemicals to clean. In mild cases, you may want to simply try your leather oil to act as a solvent on the grime -- in other words, use the liquid oil to loosen the soil and blot it away with the excess oil. This method will ensure you do not damage the leather. If the leather is extremely grimy, we recommend a natural, gentle, non-toxic cleaner. Always be certain to test for colorfastness and effect on a discrete area. It's far better to test once than ruin your item forever!