RW Mk. III
Airman 1st Class
To further this I think it's worth pointing out that hypergolic fuel is a mad idea in a combat scenario full stop. Admittedly the German regime was quite mad so there you have it. Years later the dangers and drawbacks of hypergolics were considered just about acceptable in ballistic missiles that sat in silos peacefully awaiting their one and only use, until it was realized that it was still a bad idea. And even then there were some terrible accidents, read about the Damascus Titan explosion, a single socket dropped caused it...It took off from a trolley and landed on a retractable skid. Occassionally, the pilot's back was broken during landing. Also, if there was fuel and oxidizer left, if anything went wrong with the landing, it could leak onto the pilot and dissolve their skin.
Even if nothing went wrong, the Me163 couldn't taxi (it was a glider) and had to wait for a vehicle to tow it off the runway. I'm sure this was a prized assignment for Luftwaffe ground crew: collecting a glider with remnants of hypergolic, corrosive, toxic, and generally unpleasant propellants while Allied fighters were strafing the field.
Me163 was very impressive, and kinda-sorta effective had it been developed further? But it's heavily reliant on an extreme disregard for acceptable losses, and pilot and aircrew safety. A typical wunderwaffe, willfully blind of the cost-benefit analysis end of technological warfare. Of all the things the LW was short of, pilots was possibly the worst deficiency. In that light, the Me163 was doubly insane.
I would point out that although incidents of pilots being melted (to one degree or another) may be Apocryphal, they were extremely possible, if not probable if the thing had stayed in use. Even with fuel depleted it takes a small amount of this stuff to burn tissue, and the fumes from the reaction are also toxic. If cross-contamination of the fuel tanks occured, even in a fuel-depleted state there would be more than enough left to blow the thing up.