I have recently started to wash with eco balls and miss the laundry 'smell' so i've been adding a few drops of lavender essential oil in the conditioner drawer and it smells lovely!
So i've just been surfing and bought a whole load of bulk essential oils- including lavender, tea tree (for the nappies!), sweet orange and spearmint for cleaning- they were really cheap as i bought them in big quantities and so hopefully should last forever!
Just wondered if there was anything else you suggest.