I open the windows every day for hours. It's not that the house smells because it doesn't but i would love it to have a nice aroma to it. I always think other people's houses smell lovely but mine just smells of nothing.
I use reeds in a jar as well and I use an oil burner with Yankee candle (usually) wax things in them. Some of the Yankee candle ones are really strong but the wax things for burners aren't expensive and last ages so you can use trial and error. I've been using them to his the newly decorated paint smell in my house