title_body: How should I store my aeropress?
upvoted_answer: According to the Aeropress manual:
  
  
    Remove the cap and set it aside.  Push the plunger to eject the "puck"
    of spent grounds into the trash.  Rinse and/or brush away any grounds
    left on the rubber seal.  The seal has already wiped your chamber
    clean, so no further cleanup is needed.
    
    Always eject the puck right after brewing, and store your Aeropress
    with the plunger pushed all the way through or completely removed. 
    Storing the seal uncompressed will keep your seal airtight for years.
    
    (source [pdf])