The Cleverwhite Tooth Whitening stick is the perfect way to touch up your smile so it's always bright and white. It's a ideal maintenance program after using the Cleverwhite 5 day treatment kit. The stick includes a cleaning gel at one end and a whitening wax at the other. Its the only whitening product with 3-phase whitening in one simple step. Surface whitening with active ingredients cleaning the teeth's enamel, Deep cleansing whitening through oxidising agents that break down protein chains (that darken and discolour teeth) into smaller colourless structures and Optical whitening that forms hydroxyapatite crystals which protect your tooths enamel with a smooth strong white layer. Other than white teeth, it's invisible.