Prado clutch problem

Hi clutch gurus.
I'm having trouble with the clutch in the Prado.
If the gear change is quick all is good. If I depress the clutch and hold it in for a short while before lifting my foot off the pedal stays on the floor. Then I need to lift the pedal so I can change to the next gear or take it out of gear.
The clutch and pressure plate is less than a year old. The clutch master and slave cylinder are maybe two years old.
Fluid level is good and there are no leaks.
Ideas?
I'm having trouble with the clutch in the Prado.
If the gear change is quick all is good. If I depress the clutch and hold it in for a short while before lifting my foot off the pedal stays on the floor. Then I need to lift the pedal so I can change to the next gear or take it out of gear.
The clutch and pressure plate is less than a year old. The clutch master and slave cylinder are maybe two years old.
Fluid level is good and there are no leaks.
Ideas?