A saline nasal spray is a mixture of sterile water and 0.9% sodium chloride (salt) that you can spray up your nostrils to flush out pollen, dust, and other allergens from your nasal passages (the ...

Scientists compared Vicks First Defence, which claims to 'stop a cold in its tracks' and costs £8 a bottle, with a simple saline nasal spray ... you have to have the right amounts,' he said.