Thanks for the replies, friends.
Chas - DOT5? I suppose this would require a complete flush, and not just empty the reservoir and add?
Rick - That's what I'm afraid of - that the tint is degrading rubber, not necessarily 'burning' the fluid. Again,
Chas, Rick and scooter - I'm definately covering the clutch line. Also, I'll empty and replenish what's in the reservoir with DOT3 and just see what happens.
Hopefully those 2 quick fixes will do the trick. If not, I'm taking everybody's advice, BUT...
The feel? Is the feel I described related to boiling? Adjustment, maybe?