After all, the appliance manufacturer just assembles 100s' of components made by someone else. Law suits were filed, experts were called in and our eager engineer was axed. All the details were never made public since the parties settled privately out of court. The function is very simple, alcohol lowers the freezing point of water preventing system moisture from forming ice at the expansion device. Alcohol does not remove moisture or convert moisture as some would like you to believe.
Alcohol is merely an antifreeze.
The damage caused by alcohol in the system may take some time. There is a poisonous mushroom when ingested is very tasty but will cause vomiting the next day, the vomiting stops, you feel great for about two weeks, then you just drop dead from liver failure. This is similar to what happens when you inject alcohol into a system. First, the alcohol acts as an antifreeze stopping moisture blockage. Next, any moisture in the drier is sucked out by the alcohol circulating in the refrigerant-oil stream.