Hey Michael:
Sounds like you need to rebuild the master and clean out the booster. Pumping pedal = bad seals in the Master. Stiff pedal =$$$$ bad booster seals. I have cleaned my booster before with it mounted on the car. You can use a turkey baster as noted....or syphon it out with a tube....just don't get it in your mouth!
Then I would mix up some dawn and water. Use a spray bottle and spray all around in there. Drain that. Then H2O....and drain that. And if you really want to be particular....I suppose you could throw some compressed air at it to completely dry her out inside. Slap it all back together...and you should be good to go.
Best Regards,
John M