To use this solution take some in your mouth and gently swish it around being sure to get it in contact with the infected area. Then spit it out. You should probably do this 3 times in a row, going for around 30 - 60 seconds "swishing" time each time, and do this 2 - 3 times a day.
This mix is strong enough to deal with the infection, but is not so acidic as to damage the enamel on your teeth.
After your tooth heals, you can go to an unactivated mouthwash solution that will only release as much chlorine dioxide as is needed at the time.