Cutting a lemon in half and placing it in your room can serve several purposes:
Air Freshener: Lemons have a fresh, citrusy scent that can naturally deodorize and freshen the air in your room. The lemon will gradually release its aroma, helping eliminate unpleasant odors.
Bug Repellent: The strong citrus smell of lemons can help deter insects like mosquitoes and flies. Placing a halved lemon near windows or entry points can keep bugs at bay.
Moisture Absorption: The lemon can absorb excess moisture in the air, which might reduce humidity slightly in small spaces.
Simply place the lemon halves on a small plate or dish in your room. For added effectiveness, you can also stick cloves into the lemon to enhance its deodorizing and insect-repellent properties. Replace the lemon after a couple of days when it starts to dry out.