So the good news is if you put the die with the 1 facing down (d10s are complicated, since whether the highest outcome is 10 or 9 changes based on the system) and flash-heat it in the microwave, most plastic dies have just enough of their weight shifted downwards that they are more likely to come up as the highest number on the die. But woe betide you if you use such a die in a low-roll system like GURPS.