★★★★☆
Acetone is so powerful it will take the paint right off your car!
You are using it to kill the virus, this shouldn't take more than 1 day, once the virus is dead, meaning the cold sores stop growing and developing, you need to stop using acetone, it is used to kill the virus, not to heal the cold sore, the healing process happens naturally, the more you leave it alone the quicker it will heal.