Clutch pedal sticking to floor

On cold days I am having a real problem with the clutch pedal sticking in the down position after starting. Even after allowing the car to warm up. The problem goes away if I start in gear and drive it for about a mile till it warms up. It even sticks if I partially depress it. Does anyone know why this is happening. The clutch and pressure plate seem to be in good shape with no noise and no slipping or slack any other time.
BTW .... 84 633 CSi

Clutch master cylinder needs rebuilt or replaced.

Since the slave cylinder uses the same fluid consider doing it also.

Later,

Ron, You seem to be just a wealth of info in here, glad someone that knows this much is willing to share some of his knowledge.

OKay i know that this is an old forum but i am having the same type of problem... i replaced both my slave and master cyclinder... bleeded the system... and bumped.... well its still sticking to the floor...:banghead: so let me know what i need to do next?!