Try using grapefruit seed extract. Put about 6-8 drops in 16 ounces of water in a water pik and mix it well. Use this to clean your gums and between teeth. Grapefruit seed extract works against bacteria and fungi. You could also try taking grapefruit seed extract internally. Start out slowly, with 3 drops in 8 ounces of water(stir it carefully) 2 or 3 times a day then build up the dosage to perhaps 5 or 6 drops in 8 ounces of water 4 times a day.