[header] How to clean old leather [title] Determine what kind of leather you're trying to clean. [step] Knowing the type of leather you have will help you select the correct cleaning product. Natural or untreated leather does not have a protective coating, while treated leathers do. 
You can tell that your leather is untreated if it's soft to the touch and doesn't feel like it has a plastic coating. [substeps] Untreated and natural leathers may change color after you clean them.