Go to your local vets (yes, really) and ask for a 50/60 mil syringe, they will probably give you one free.
Fix some rubber/plastic tube on it.
Suck up some clean brake fluid, without any air bubbles in.
Attach to slave cylinder bleed nipple and then open it.
Pump the fluid out of the syringe, effectively bleeding it backwards (the fluid may overflow from the reservoir if it's full)
You may need to do repeat once or twice to get all the air out.
Works everytime and you don't even need to touch the pedal.
Hope this helps