A:Answer The Ninja Hot ‘n Cold Blender has a CLEAN BUTTON” on the display panel. You place 24 oz of water into the pitcher, with 2-3 drops of dishwashing liquid, lock the lid in place, and press the “ CLEAN BUTTON.” It will them go through a pre-programmed cycle for a set amount of time. Once done, rinse the pitcher and set aside to dry. Depending upon what you are preparing in the blender, you may sometimes encounter a situation whereby “stuck-on” ingredients are present at the bottom of the blender, (near the blades) that the cleaning cycle has loosened, but not washed away completely. In the event that you encounter this type of situation, ( WHICH IS VERY RARE) there is a long cleaning brush that comes with the unit, that will reach down into the bottom of the pitcher. The BLADES are SUPER SHARP, so you should AVOID PLACING YOUR FINGERS ANYWHERE NEAR THE BLADES!