How often are you topping off the fluid? If you are at all, it has a leak somewhere, brake fluid doesn't evaporate <img src="/forums/images/graemlins/kewl.gif" alt="" />

Try checking where the pushrod connects to the pedal inside the cab. If it is damp, there is at least one of the leaks. I've rebuilt many master/slave cylinders over the years, only costs a couple bux <img src="/forums/images/graemlins/cheers.gif" alt="" />

1986 Toyota 4x4 22wEBer
Ported EB Offroad H/O Head "Josh Cam"
Ported Intake & Weber38mm Carb
LCE Header & 2.25in Exhaust
RB 1" BL, RS5000, SAW Tbars

2011 FJ Cruiser - SOLD