A few things to check.....
Either the cable is stretched out and needs replacing or the clutch itself is worn out.
You might try adjusting it first and see if that helps. If it is stock, then up under the dash on the top of the clutch pedal arm you'll see a plastic "sprocket". Normally, you pull the pedal up as hard as you can with your toe and then push it to the floor and repeat several times until you hear it click. This will tighten the cable and move the throw out bearing closer to the fingers of the pressure plate. If possible, before starting, remove the metal clutch fork cover from the side of the bell housing and look up in there. You need to adjust it to the point that you have 1/4" gap between the face of the throw out bearing and the fingers of the pressure plate when the pedal is all the way out at the rest position.
If this doesn't help, you really should look into an aftermarket cable and quadrant from a reputable company like Steeda.
How many miles are on the clutch that's in there?
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