If the leather sofa is peeling, then it is likely that it is not leather at all. Leather is a long-lasting material and does not peel unless it is ancient. The leather you have must be bonded or mixed leather. This leather is more likely to peel or flake easily. Another reason could be that the leather's surface is painted and peeling off - not the original leather. Sometimes, it could also be the sealant on the leather coat that could peel. Unless you live in low humidity, your leather couch will be fine. But, using more cleaners or using harsh cleaning products could also be bad for the leather couch.