i use apple slices, they are by far a better choice, they work faster, less of a chance of mold, basicly leaves no taste in your shit, where as oranges may leave a taste behind not all like. also, it's only personal prefrence to an extent, it does serve a purpose... dry weed = burns fast as hell... you wanna be smoking dry shit and smoke 2-3x as fast as i would with nice moist weed, that's on you...