Water has a greater "surface tension" than gasoline. If it gets into, or "across" a jet, it will plug the jet because it has a greater surface tension and often cannot be drawn through the jet like gasoline. This is what can happen if water gets into gasoline, especially in our model engines, (or their original applications like weedeaters, snowblowers, etc.) with their small jets. Alcohol is hygroscopic. That means it will absorb moisture, or water, out of the air or a mixture. You can often add a small amount of alcohol to gasoline in a four-stroke engine like in a car, and it will absorb the water and allow it to pass through and be burned. However, if you have alcohol in your gasoline, it can absorb water, and that will not mix with the oil in our two stroke gas/oil mixtures and can cause big problems. All glow fuel has alcohol in it, and it will absorb moisture if you leave your can or jug open, especially in humid climates/areas. I do not know about oil/water/alcohol mixing in glow fuels, but I would suspect it could be very problematic as well. We have had a lot of problems and engine failures in ultralight aviation with alcohol in the gasoline, and all the engine manufacturers specifically warn against using gasoline with alcohol in it for this reason.

As we have already mentioned, alcohol, or alcohol/water injection is a completely different matter. It is a different application for a different reason.

Hope this helps clear things up,
AV8TOR