saline gargles (a weak salt solution of 1/4 tsp of salt to 8 oz of water) used as a gargle will help sooth a sore throat and loosen any exudate (that "white stuff") that often accumulates on or around the tonsils. most people tend to overdo the salt part. making it too strong to tolerate.
what is the purpose of a salt water gargle for a sore throat? . why would you use this method? what does the salt provide to help with the sore throat?