Good Quality Aroma Set, Natural Aroma burner set, Can be use As Insect Repellent too, The best for Air Freshener, Best performance. Use In Home , Office , Hotel , Spa Etc. Coming In Alluminum Hard Bottle. Citronella oil helps to clear the mind and has a general toning and tonic effect on the body. It is helpful with colds, flu and minor infections and also has deodorizing qualities. Citronella oil's most useful quality is that of it being an insect repellent. It is best used in a spray, a diffuser or on a cotton ball amongst linen. It is also useful in ridding cats and dogs of fleas. Citronella oil may irritate sensitive skin and cause dermatitis in certain individuals.