This is a good question, especially when your fur baby is active and loves to get dirty. Extend the lead out and put it in the lock position. Use a gentle detergent to thoroughly clean the ribbon and outside of the housing. If possible, put the leash in the sun to dry while leaving it fully extended. Be sure your leash is completely dry before retracting it back into its housing. You might consider having a back up the retractable dog leash for those days.