What I do, is cut the foundation off the frame, and clean it as well as I can wuth a hose. Being that I live in PA, and how late in the year it is, I would probably let it stored outside somewhere. It will surely freeze before winter is over, and you are in Cont. so it will freeze there as well. I like to hose them off, because it just saves time in the spring when you are really busy with foundation replacements.