I have not had the white line for 3 days in a row now! I would not say the white line has to do with dead skin decomposing since my lips are not fully healed, yet. Someone else wrote it took about a month for his lips to heal with anti-fungal drugs. I would try the Oral B mouth rinse 2x/day and before you go to sleep at night to make sure it is not caused by dental plaque. The name of the drug I am taking is called Sporanox (200 mg 2x/day).