For your symptoms, I recommend a dual approach: Moisturise: Use an over-the-counter saline nasal spray or rinse 2 to 3 times daily. This will safely hydrate your dry nasal passages and help thin out sticky mucus. Allergy Management: Take a daily non-drowsy oral antihistamine (such as Cetirizine or Loratadine) to control your dust allergy. Alternatively, a steroid nasal spray (like Fluticasone) can reduce nasal inflammation. Additionally, stay well-hydrated by drinking water, and consider using a cool-mist humidifier in your room. If symptoms persist, please consult a doctor for a personalised plan.