Chevrolet Repair: 97 chevy with clutch problems, clutch cylinder, clutch problems

Question
I have a 97 chevy S-10 2.2L pickup. Had a new clutch installed last year. Has been running fine until recently.  The clutch started going to the floor before it would shift. Check the fluid was low enough that we added some and decided to bleed. We bleed the system and the clutch was better for two days then we couldn't get into gear at all.  Decided that a new master cylinder would be the easiest thing to start with. Replaced that last night with no real problems.  Bleed the systems again. I was still getting air after many bleeds decide to give it a test run anyway.  Ran okay no low fluid.  Started it up this morning and it would not go into gear again. I read on a site that when you bleed a clutch you should press the clutch down open the valve and close it before it hits the floor.  I did not do this. I pressed the clutch opened the valve and let the clutch go to the floor before I closed it.  Would this cause my problem of not going into gear? If so when I bleed it again how long does it usally take to get the air out of the system?  How much fluid does the clutch cylinder use? If this is not the problem could it be the slave cylinder in the transmission?  

Answer
Hi Barb, The way to bleed the clutch is to push the clutch pedal to the floor and then slide your foot off to the slide and let the pedal fly up to the top. You'll need to do this like 20 to 25 times. Be sure to let it go from the floor and don't slow it down when it is coming up, just slide step it. If it stills goes bad after this you need a slave cylinder.

Let me know how you make out

Mark