No, I don’t think they do. I get this question quite frequently and it seems to be a common peeve with candle buyers that their candle’s scent will dissipate after a short amount of time. I have not noticed this with our candles nor with other good quality candles. I’ve had a medium candle tray sitting on my coffee table in the front room for at least 4 years now, and on the rare occasion I go into the front room I get a whiff of the scent from it..Honeysuckle I think.