Taste a lemon in four pieces, salt it and put it in the room.

the Mood: Lemons have a fresh, invigorating scent that has been shown to lift the mood and reduce stress. By placing fragrant lemons in your room, it creates a positive and refreshing atmosphere that will improve your mood and give you a sense of well-being.
Naturally Insect Repellent: Lemon content contains essential natural ingredients that are non-toxic to insects. Put lemon juice in the dirty room and then you can also store it meticulously rarely like moss or mosquitoes if it does not respond to chemical inserts.