lower your heating and air conditioning bill with incense ?

An incense stick is a great tool to find leaks around doors and windows. Light one, and you'll notice that the smoke generally travels upward. Being careful not to burn curtains, bring the incense stick around your windows and doors. Where there's a significant leak, you'll see the smoke travelling sideways towards the leak rather than upwards. Sealing those leaks with caulking or weatherstripping can make a huge difference in your heating or cooling bills.