No supplement page can name a best product for you, but you can judge any spray with the same checklist.
Look for a full ingredient list, a stated serving size, clear usage directions, a sensible guarantee and honest not-a-treatment wording.
BreathiZen lists five named botanicals, a 0.60 mL serving, once-daily directions and a 60-day guarantee. Check the amounts on the label yourself, and see a clinician if your congestion is frequent or severe.