This is the best advice so far.

Here are some facts :

Water dissolves the scab on the cold sore, and this will slow the healing. Keep it dry. Hard to do when it's at the corner of your mouth.

Do not put any kind of salve or ointment on it, because :

- Salves and ointments keep the sore moist, and this will prolong the sore.

- The salve or ointment may help the virus transfer to new spots.

- The virus can live in salves and cosmetics. Keep lipstick and chapstick away from the sore, because the virus can live in the stick.

My remedy : get some 99% rubbing alcohol, put a drop on the sore every now and then throughout the day. This will kill any virus that is coming out, and will dry the sore. The drier you can keep it, the quicker it will heal up.