My husband and I have used a Miracle-Mineral-Supplement mouthwash for infection and that brought relieve. Look under the R ratings at Miracle-Mineral-Supplement it is 25 drops in 8 oz of distilled water. Swish for 60 seconds and then spit it out.
Look for the post to make sure I have the amounts right.
My dentist also uses ozone, but I did it myself since I have the equipment.