1998 Chevy S-10 clutch

Clutch pedal had alot of play and would not shift but would still start mechanic bled line and it would shift but had alot of play in it. Samething week later, so he replaced clutch master, got it to shift but alot of play, went in for 3rd time and he rebled it. Worked good for 2 weeks and happened again. He found no leaks and said slave was ok should I try changing line?