Here's a little secret that works for me. I suffer from cold sores and in the last few years have a system that destroys my cold sore the same day. The Answer: Red Wine! I simply dab the cold sore every couple of hours with any kind of red wine and in a few hours it dries up and the scab falls off. For me it has work much more efficiently and cheaply than any other method. I also have sensitive skin so like to stay away from harsh chemicals. Not to mention that you also get enjoy a nice glass of wine.