Fast White Professional Teeth Whitening System will get your teeth 8-10 shades work in 60 minutes a day for five days, with no overnight treatment required. Fast White Professional Teeth Whitening System will get your teeth 8-10 shades work in 60 minutes a day for five days, with no overnight treatment required. is worn over your teeth for 1-4 hours per day, or even overnight. You can wear the trays overnight (which can yield results after as few as two Hey I’ve got great white teeth, but you should be warned that a nice smile comes. that is worn over the teeth for several hours each day or overnight.overnight, and not a lot of people can handle having a brace. Out of the blue, litterally a change overnight, a small black hole has appeared on the bite surface. over the weekend i got myself a triple venti white chocolate. diffi...