We're trying to winterize our 2011 F/C without antifreeze as my wife really struggles with smells and even the non-toxic stuff effects her. Blew out all our pipes yesterday but found water standing in the shower drain (right about the level of the drain.) Can't seem to get it to go down. It's been freezing temps but we've kept it well heated inside. I noticed the grey water tank on these is not inside the "capsule" of the airstream but hangs below it. We've emptied the tanks but I'm wondering if any one has had freezing between the shower drain and the tank? It's the only thing I can think of at this point. Tried heating it directly from above with a hair dryer but only manage to fry the dryer
Next attempt would be to put a heater underneath directly on the grey tank but I'm worried about damaging something else!
Thoughts or suggestions?