Just Purchased a never used 2003 sunline T1950 directly from an individual who unfortunately became sick and couldn't use it ! Never owning a camper before I know little about operation of a container unit should as this. I have the general manuals but didnt get the benefit of having someone demonstrate its many features..My question, I noticed the battery compartment is full of what appears to be soapy water ! Is this a winterization or protection technic ? Also noticed that the battery after towing the trailer 400 miles only remained charged for perhaps two weeks after parking the unit. It was only parked in my yard and only turned on inside lights, etc to see that all components worked properly. Could my The Battery be defective ? Thanks, I am stressed, but terribly excited !!!