title_body: Espresso drips out slowly
upvoted_answer: As suggested in comment above, descaling or decalcifying your machine may solve your problem. We just run straight distilled white vinegar through ours to do so. Running the machine with distilled water rather than tap water helps keep mineral deposits to a minimum.
  
  Also, running it without water can create an airlock (which makes it take a while for the water to pull through), and allows the pump to spin freely, and so can wreak havoc on, or at least weaken the pump. (I don't know what specific pump is employed by your machine, but this page may apply.) 
  
  Moreover, in the event that the pump has become weakened, it can be helpful to keep the reservoir completely full of water. I do not believe that a normally working machine would be affected too much by the grinding coarseness selected. 
  
  Edited to add: While commercial descaling/decalcifying solutions are available (and might work really well) for this application, the staff on a website selling such reports in the Q&amp;A, "Breville actually recommends using vinegar to descale their machines while you're under their warranty." 
  
  When deciding what to use, it may be to one's advantage to research whether the product is under warranty, and what the specific manufacturer recommends. Also, take into consideration that the unlisted chemicals that might be found in a given solution could put off foul odors and/or flavors (not that vinegar makes a good perfume, by any means).
  
  P.S.  I just found out that the safety data sheet for one descaling liquid contains the following hazard warning (although the company might issue the same warning about vinegar if they sold it): 
  
  H315 Causes skin irritation.
  
  H319 Causes serious eye irritation.