Instructions: First, adjust the grill mouthpiece to the shape of your mouth. Then insert the silicone fixing bar in between the back prongs of the grillz and place both in hot water together. Once the bar softens and becomes clear, remove the mouthpiece from the water and place it onto your teeth. Adjust as necessary for the fit and look you desire. The fixing bar should take approximately 15-20 seconds to harden. Now you have grillz that fit your teeth perfectly! Attentive Service: If For Any Reason You Are Not Satisfied With Your Purchase Within The First 30 Days, Please Just Send Us A Message. Our customer service assistant have 24/7 service, devote yourself to solve your problem in 24h. Just buy and try, without the worries behind. Disclaimer: 1.These grillz are intended for decoration and entertainment purposes only. 2.They are not intended for use while eating or sleeping, or for the replacement of natural teeth or broken fillings. Most of customers will find the molding bars easy to use, however, if they doesn't fit well for your teeth we suggest you can try use high sticky level gum for the molding. 3.Do not use any solvents for cleaning. 4.lease clean the grillz in cold water, dry after use, and store in a box.