cough
i have used a saltwater rinse for years (after i had nasty sinus infections and bad coughs two years in a row).
you can mix your own or buy some stuff in the drugstore . i use 'hydrasense' when travelling , expensive but easy for travelling .
our ear, nose, throat clinic at our university hospital recommends it also
(i left a printout with them some years ago, they have now put it in a pamphlet with their 'seal of approval' on it - but i didn't get any credit for it
! hbg
...SALTWATER RINSE...