Advanced Teeth Whitening Kit - Professional Dental System for Home Use - Safe, Effective and Fast Results for a Bright White Smile Brush and floss with regular toothpaste. Whitening gels work best when used to clean your teeth. You may want to try wearing the tray without any gel first to check for comfort. Also make sure the tray is clean and dry before applying any gel. Moisture can reduce the effectiveness of whitening gels and slow down the whitening process Notice You can increase the whitening time after several sessions. If you are sensitive, please do not increase the whitening time. Do not exceed 1 hour of treatment per day, we recommend that you only whiten your teeth once per day. Your Teeth Whitening Kit Includes: 5/10 Pieces - 45% Carbamide Peroxide Teeth Whitening Gel Syringe; 1 - Thermoformed Mouth Tray - (easy to mold as you can see in the instructions); 1 - Accelerator with battery light LED - (for improved tooth bleaching treatment);