title_body: Oxiclean for cleaning drip machines?
upvoted_answer: I wouldn't use Oxyclean inside. 
  That "brown foam" that you had in the carafe would be difficult to remove from the inside working without a LOT of rinse cycles.
  I simply use a solution of 1/3 vinegar and 2/3 water and run that through with great results. 
  I also use filtered water which helps tremendously keeping things clean.