good luck on the viewing, and in some regards the agents right dont fret, most of the folks will come in with plans to change things the way they want it, cause they also saw it on hgtv

subliminal suggestions boils some garlic in water the night b4 not over do it just enough to throw a good taste aroma to the air, lavender is good too, and a very good vanilla candle can leave them desiring cakes and baked goods by time they leave lol( my wife burns too many of the vanillas) i end up baking cakes

Good Luck