See below instruction which is given by my Dr in USA.
Saline Nose Drops
Mix 1/4 teaspoon table salt in 1 cup (8oz) of warm water. Put one or two drops in one nostril, wait one minute, then suck out with a bulb syringe. Be sure to squeeze in on the bulk syringe before putting it up to the nose. Do this every 3 to 4 hours, or more often if necessary.
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