It might be tempting to just rinse it out and set it aside to use again tomorrow, but it’s important to clean your coffee press after each use. Coffee left in glass containers stains and leaves a film that is difficult to remove if it’s left on and reheated again.  Gently remove the grounds from the bottom of the carafe with a plastic spoon or your hands. Then wash all of the pieces with hot soapy water. Let air dry until you use it again.