You Will Need : Windex or a Windex Like Product. 2x Cloths Decal or Skin Ruler MicroFibre Cloth, (Comes With Glasses and such) Make Sure To Wash Your Hands Thoroughly To Remove Any Oils From Your Hands Power Fans Off, Preferably Apply Skins In an Enclosed Area. 1. Lightly moisten a cloth with Windex or Simple Green. 2. Wipe down the system housing, being careful not to touch the cameras or screens. 3. Use a dry cloth to dry the areas you ahve cleaned. For Best Results: Use a micro fibre cloth to wipe over the 3Ds after cleaning. 4. Make sure there are no particles on the are where the Decal or Skin will be applied. 5. If possible start with the skin for the top of the housing. Line up the holes for the outer cameras with the skin, using both hands, gently lay the skin to the surface. Let the middle of the skin touch first. If needed use a ruler to flatten the sticker to the housing. 6. Start rubbing up and down from the middle and work your way out to the edges, one side at a time. 7. Repeat Step 4 for the bottom of the housing, and line up the corners of the skin to the corners of the housing i.e where the little plastic bumpers are, using both hands, gently lay the skin to the surface. Let the middle of the skin touch first. 8. Start rubbing up and down from the middle and work your way out to the edges, one side at a time, Making sure there are no bubles while doing this. If needed use a ruler to flatten the sticker to the housing. 9. Open up the unit and double check that you cleaned the inside of the 3Ds. Now line up the piece that goes around the bottom screen. Line it up with the edges of the screen, circle pad, d-pad and buttons . Gently lay it to the surface. Start rubbing from the center and work your way to the ends, taking your time around the buttons and the d-pad and circle pad. 10. Line up the edges of the skin, with the edge of the inner housing and the top screen, being mindful of the speakers. Rub from the edges and out to the edge of the housing. Smooth with a ruler if neccesary.