Dollar Tree is selling good old sodium hydroxide (lye) as drain cleaner 
for a buck.
  Its still good for cleaning your coffee pot (dipit) your paint brushes 
(brushsaver), your oven
or anything else that it won't hurt.
  It dissolves many crusty things.
Including your favorite natural bristle brushes if you leave it too long.
  ("Nair" is hair removal by modified sodium hydrox.)

  Don't soak forever and keep it far away from your eyes or aluminum
(they use heated high pressure lye to actually mill aluminum)
     yours scott

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    Scott Grandstaff
    Box 409 Happy Camp, Ca  96039
    scottg@s...
    http://www.snowcrest.net/kitty/sgrandstaff/
    http://www.snowcrest.net/kitty/hpages/index.html