I purchased two Farm Innovators MODEL C-250 deicers from my local Tractor Suppy to use in a chicken waterer. The de-icers work well to keep the water in the containers from freezing, but after a few days, the they start to develop of clear gelatin slime on the cast aluminum ring and the end of the heater rusts up pretty good and causes rust in the water. My question is this... can anyone tell me what they think this slime gelatin substance is that starts to collect on the de-icer ring? I have these in two different containers altogether... one is a plastic chicken waterer and the other is a regular 5 gallon bucket. Bot de-icers collect the same crap on them, so it's not caused by the container they're in. I'm concerned that my chickens are ingesting this stuff and then I'm eating their eggs. Can someone tell me what this stuff is please? Pic attached.