Why isn't my clutch master bleeding?

you will need a clean piece off hose to fit over bleeder screw on slave cylinder.stick other end of hose in a clean jar of brake fluid.fill resivoir.open bleeder screw and have some pump clutch pedel as you keep filling resivoir.do this untill no more bubbles come out hose in jar.if this does not work may have bad clutch master cylinder or slave cylinder.most likely slave cylinder is bad very rarely does master cylinder go bad.to ckeck slave cylinder just pull back rubber boot if you see fluid come out it is bad.