I'm sorry to hear about your persistent cough. Smoking and frequent consumption of cool drinks can irritate your airways, leading to a long-term cough. While quitting smoking is the most effective way to improve your symptoms, here are some additional steps you can consider:

• Consult a Pulmonologist (lung specialist): They can evaluate your cough thoroughly and may recommend treatments or investigations to rule out underlying conditions.
• Medications: Some cough syrups, like expectorants and mucolytics, can help loosen mucus and ease coughing. For example, a combination syrup containing ammonium chloride, diphenhydramine hydrochloride, and sodium citrate may be prescribed by your doctor to relieve symptoms.
• Avoid irritants: Try to reduce exposure to smoke, dust, and strong fragrances that can worsen your cough.
• Hydration: Drink warm fluids such as herbal teas or warm water with honey and ginger, which can soothe your throat.
• Humidify your environment: Using a humidifier can help keep your airways moist and reduce irritation.
• Diet: Incorporate traditional Indian foods like dals, millets, and spices such as turmeric and ginger, which have anti-inflammatory properties.

Please remember, these measures can help manage symptoms but do not replace quitting smoking, which is crucial for long-term lung health. I strongly recommend you see a pulmonologist for a detailed assessment and personalized treatment plan. If your cough worsens or you experience symptoms like breathlessness, chest pain, or coughing up blood, seek immediate medical attention.To narrow down potential causes, we will need some more information.Please tell me your age and gender. I understand you're experiencing a long-term cough due to drinking cool drinks and part-time smoking and are looking for solutions besides quitting.