Re:Fresh Oxygen Brightener Refill, Add 1 – 2 Tablespoons per load directly to drum with laundry soda to brighten and lighten whites and colours. Also excellent for home cleaning; make a paste with 1 – 2 T and scrub sinks, tile & grout!,Sodium percarbonate, Sodium carbonate, Citric acid, Citrus limonum (Lemon essential oil).