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Is it safe to use diluted Dettol or Savlon near my dog's lips? - dogs skinned lip

My dog has an infection of the skin. I tried everything, what your body to him, but not anywhere near the face. I would like to know if it safe to use diluted Dettol or Savlon on the lips of my dog that has the problem. He applied for a very dilute solution once and then, after wiping his mouth with water. Is this normal?