I doubt that water is your problem, but nevertheless, there are shortcomings to having ethanol in our fuel.

The biggest problem, aside from reducing the BTU energy content and thus reducing mileage, is that ethanol attracts and holds water extracted from the layer of the air/fumes mixture above the fuel's surface in the tank. Boaters who overwinter their vessels have always kept their tanks full, to minimize this volume of air from which moisture is drawn. Now, with ethanol in the fuel, there is a stronger attraction for water, and it sets up steeper concentration gradients for the movement of water molecules: first, air inside the tank over the fuel to the fuel; and second, air inside the tank to air outside. Bottom line is that water will be absorbed into the fuel faster.

Boaters are, and have always been, advised to use "drying agents". These don't really dry the fuel, but merely keep the water dispersed in the fuel (to be consumed in the engines). But many such agents are alcohol based, if not ethanol then isopropyl, which can exacerbate the initial problem. However in boating stores, you can buy a very good dispersant that is not alcohol-based. It's called EZorb, and it's the best product on the market. Although costly as it's sold in a bottle, it's very economical to use: only about 1 oz per 50 gallons. If you look, you'll find it next to the company's other product, Start'NStore, a fuel (overwintering) preservative.

I use it in all my cars (as well as my boats) in the winter.