The problem with brake fluid being hydoscopic is not so much the water content being "squishy" as when the fluid heats up and the water boils the steam is squishy or another way to look at is is now it is a gas and is compressable, when it was a liquid it is noncompressable. This is the most important reason to flush out and change the brake fluid every two years. Also when there is a high moisture content in the brake fluid it corrodes the metal parts internal to the system causing leaks. If the system has not been flushed for a long time and the fluid is very dark flushing with fresh fluid will wash out all the crud that has been keeping the seals from leaking so you will find yourself rebuilding everything. Before attempting to flush inspect the area around the master cylinder for any signs of moisture, this indicates a leak and before you flush the system replace the master cylinder and be ready to replace or rebuild the calipers. If the brakes don't seem as effective as they should make sure there is vacuum present at the booster, check the hose isn't kinked or leaking. It could also be that the system is so corroded that a caliper is stuck reducing braking power. On a properly functioning brake system in a Delorean the brakes should be good, maybe it's time to change the pads? David Teitelbaum vin 10757