I changed brake pads, rotors and calipers on all 4 wheels, bleeded the system starting from the furthest to the master cylinder, RR, to the closest, FL. Ever since then, I keep losing fluid a lot in spite of having a pretty good braking performance and hard brake pedal. The fluid in the reservoir keeps going down to the minimum level. No apparent leakage on the road. Once I fill the reservoir, it only takes a couple of miles or so before the red alarm comes on indicating low level of brake fluid. And starts again. I must have done this at least 3 or 4 times so far. Where the hell does the fluid go. Leakage in the booster would show inside the car on the driver side, but it's dry.

Any guidance would be much appreciated.