The SImply Saline is over the counter, you can get it in the cough/cold area in the drug store. Try and get the 3%(it in the blue bottle). To get him to do the saline, bribery works well; a piece of gum/candy for a squirty nose(that's what we call it). I tell Maggie we are giving her nose a shower. Sometimes kids are really stubborn so if he really hates it or won't let you do it I wouldn't force the issue. Just make him drink lots of fluids, get him in the shower or bath and watch that cough.