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Best Answer: Yes citronella candles work, but their effectiveness decreases with the age. Oil of Citronella is a volatile, liquid oil derived from dried cultivated grasses. It works by repelling animals and insects without harming or killing them. It has a distinctive odour, which repels certain animals..
Glow sticks work by chemiluminescence â that is, the light is emitted as a product of a chemical reaction. Items that need to glow continuously with little or no âcharge,â like clock or watch hands that glow for hours after a light has been turned off, work by radioluminescence.