Clean dog's ears & face gently, focus on wrinkled faces & short-muzzled breeds. Prevent bacteria & tear stains.
Cause of tear stains: bacteria in wet areas. Small dog's teething can misalign tear ducts. Flat-faced dogs have humidity in folds. Address root cause.
Keep dog's eyes clean with specific wipes. Avoid powders near eyes. Consult vet for pet products. Use cotton to clean. Consider internal pH change. Rinse eyes after shampoo.