Usually the rubber seals go bad. On the other hand, if you live in a very humid area you might have a little water in the hyudraulic fluid and it could have rusted the master cylinder. They aren't usually terribly expensive to replace if you do it yourself.
Take it off
A 1999 Hyundai Accent does not have a clutch adjustment. The clutch pedal however, can be adjusted to a different height.
There is a reservoir on the clutch master cylinder, mounted to the firewall toward the driver side. It's got a black cap.
I have been told by Hyundai services that it would cost me $950 to replace the clutch of my 2000 Hyundai accent. I think this is a reasonable price.
Yes there is a hydraulic clutch on the miata. Just to the outside of the firewall, near the brake master cylinder is the clutch master cylinder and resevoir.
If it does not have a Hydraulic clutch, then it has no fluid. If it has a Hydraulic clutch the clutch master cylinder is normally located on the firewall, driver's side, near the brake master cylinder.
Fork
there is no clutch cable. it has a hydraulic clutch. there will be a clutch master cylinder on the firewall near the brake M/C. a hydraulic hose will connect that to the clutch slave cylinder on or near the tranny. the slave cylinder pushes on a fork (lever) that disengages the clutch.
The clutch slave cylinder , for a hydraulic clutch , is inside the manual transmission bellhousing
The clutch slave cylinder for a hydraulic clutch is inside the manual transmission bellhousing
There are two normal causes. The clutch is worn out or there is a leak in the hydraulic clutch slave or master cylinder. To check the clutch, press the clutch slave cylinder down. If the clutch slave cylinder bellows compresses down to the slave cylinder, the clutch is worn out. Check the clutch master cylinder fluid level. if this is low, then the clutch cylinder need to be checked. To check for a hydraulic leak in the clutch slave cylinder, remove the cylinder's bellows and check for any fluid. If fluid is present, rebuild or replace the cylinder and bleed the system. To check the clutch master cylinder, check the back the of clutch master cylinder for leaks. If fluid is present, replace or rebuild clutch master cylinder and bleed the system. In my experience, hydraulic leaks occur at the clutch slave cylinder.
The slave cylinder for your hydraulic clutch is located inside the manual transmission bellhousing