Yeah we had to mess mine up pretty bad to get it out and tapping in the allen key was requiered. i would suggest you go to your local dealer and get a new plug to replace the old one with, i should only run you around $3-5, and it will make life alot easier in the future.
I sucked my out with a large suringe with a ruber hose on it (to get to the bottom)
have fun... the smell isnt as bad as these guys say
either that or my smell resepters have been de-sencitized by the stuff at work