This product is safe to clean the tear stains under the eyes, and even to squirt into the eyes to flush out debris. I did not want to use any products that would not be safe to get in the eyes. Also, I really didn't want to use the products that you feed to the dog to get rid of tear stains. I just wanted something gentle and safe. With that being said, this does a good job, over time, reducing the staining. It hasn't completely removed the staining yet, but the improvement is excellent. Last year, I rescued a cocker spaniel. By "rescue" I mean I found her wandering in the road, with no tags, covered in dirt and knotted fur. I've never owned a cocker, and was unprepared for all of the grooming needs. Her excess tears caused lots of staining, and began to stink. This product has eliminated the bad smell, and made a big improvement on the staining.