Important pages –WhiteningStrip BasicsInstructions forPlacing StripsInstructions forWearing StripsSide Effects& SafetySwallowedstrips.Using extrastrips / kits.AllPages All topics.  »All Whitening Strips pages.  »Using whitening strips – Continued. Directions for wearing Crest Whitestrips® – Part 2 – How long are they worn? | How frequently? | Wrapping your treatments up. | When will you start to notice results? | … Continue reading whitening_strips/a6-how-to-use-whitestrips.htm