2000 Ford Focus

Sounds like you need to bleed the hydraulic clutch. Jack your car up and put jack stands under it. Then bleed it like you bleed hydraulic brake system. Have one person in the car, press the clutch pedal down slowly three times, then hold it down. Have another person under the car with a length of hose leading into a plastic bottle with about a inch of fluid in the bottom of the bottle, make sure the end of the hose is in the inch of fluid in the bottle, so you can see if there is any air bubbles coming out of the hose and into the bottle. Repeat process until there is no more air bubbles. Hope this helps you