Yes I called the manufacturer. They say clean it with a product called IRGASOL FL (intended use according to MSDS is for Textile Machine Cleaner). But they could not give me the cleaning procedure. I told them what I was thinking about using and that said they would see if that would work. So they want it cleaned with a cleaner designed to clean textile machinery and can't give a procedure for the cleaning of the dome. Really? I wonder what gives?