Purchased for the issue of tear stains in Maltese dogs. In everyday use, it removes the crusts, but these can also be removed with a simple solution. For some hairs that have turned brown and need to be cleaned every day, it does nothing, even with the recommended use of leaving it for 3 minutes and then wiping. Therefore, I do not consider it necessary for everyday use and not worth the cost, as you can remove the daily crusts with a solution of vinegar or chamomile. It does not justify its cost.