Daily nasal irrigation with a salt-water solution (a mixture of 0.9% non-iodized sodium chloride and either purified or filtered water warmed to around 98 degrees F/ 37 degrees C, with or without inclusion of a buffering agent such as sodium bicarbonate) has been recommended as both an add-on[8] and primary treatment[9] in such cases and is preferable to the use of corticosteroids except in the most serious cases of acute bacterial sinusitis.[10] Irrigation should be used with caution in infants, as nasal drops are not widely tolerated.[11]