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Fill the blender carafe halfway with warm water. Then, add a few drops of liquid dish detergent. Blend on a low setting for about a minute until the carafe is thoroughly sudsy. Then, pour out the soapy mixture and rinse until clean. Make sure that the lid is secure! If the lid comes off, then you'll get soapy water everywhere! After you clean the inside of the carafe, leave the jug upside-down on a drying rack. At the very least, wait to put the lid back onto the blender jug until the inside is completely dry. A moist interior can lead to condensation and provide an environment for bacterial growth.
Blend dish soap. Allow the blender to air-dry.