For years I used Starsan and just dumped some of the solution into the kettle at the end of the brewday... let it soak, scrub it clean and the kettle was ready to go. I have been using Iodophor now for a few months and I do not have any Starsan in the house. That doesn't mean I won't use it again someday but for now... what's a good way to clean the kettle? I assume something acidic since Starsan is acidic. Vinegar? A vinegar solution? Sometimes I see gallons of vinegar at my one grocery store for very cheap. Any thoughts?
In related news: The batches made using iodophor have been great and using it is nice. No foaming. Yes, it's staining some of the plastic I have used with it. The smell reminds me of being a newbie brewer.