Put the lemon in pot with water & let them simmer on low on stove for hours, you feel a beautiful smell.
Just take couple of coffee beans & put it in oven for 10 minutes and open the door. You feel an amazing smell.
You just leave a cup of vinegar in kitchen overnight to wake up with a fresher-smelling kitchen.
7- Hang dried herbs in your room. Dried herbs like olive branches, sage, & bay leaf.