The right way? "Leave less underneath the eye and work on the discolouration only. Try the Un Cover-Up Concealer, £34 . If you want to cover blue colours, take a concealer that has a salmon tone – you can even mix your usual concealer with a coral or pink lipstick – and just put it where the bag or dark spot is. We all wrinkle on the outside corner of the eye, so it doesn’t make sense to layer on concealer over this area. No matter what brand it is, it’ll cake off. Concentrate it to the areas that need it the most."