What do you mean you mixed it without water? If you bought fuel from a standard pump, even if it's not e-85 it probably has some small portion of alcohol in it for polution control reasons. That Alcohol portion is hydroscopic. That means it collects water out of the atmosphere. It could be a fuel can that isn't sealed that breaths ever day as temps up down - night day.
I am running only pure gasoline. A station here in Ohio has it. Blue handle pump. It's 25% more expensive but I didn't have to tear down any carbs this spring when I fired up the peds. My chainsaw started right up. Anything I have that sits for periods without use does not get any ethanol containing fuel.
Take all that gas and start blending it through the lawn mower or in the car. Won't hurt a thing. Figure out who in town as straight gas available and buy that. Buying "race gas" will achieve the same purpose as it never contains alcohol for reasons of getting through fuel tec.