First off, we are a food packaging manufacturer. My experience and conversations with auditors has been if the lubricant is prevented by physical barrier or proximity (not above or close to the path of the product) from potential contact with the product or product path, a non-food safe lubricant can be used. An example would be a remote or side frame (below path), crank case or reservoir. Manufacturer requirements must be taken into account as well. A CB can't require you to use a lubricant that is outside the specifications of the manufacturer if it may destroy, let's say a $20,000,000.00 piece of equipment. That being said, you do need to take whatever measures possible to ensure the lubricant poses no food safety (or quality) risk. We have changed all of our lubricants to full synthetic and, where possible, food safe. Don't forget to include your compressors especially if your processes use compressed air in contact with product or equipment contact surfaces. As far as cleaning, that shouldn't be an issue as there are myriad food safe cleaners out there. Other chemicals would need to be covered by your maintenance procedures. Ours include a "Machine Clear" that includes a checklist of items to be done (clean all area surfaces, gather all hardware and fasteners etc.) after a repair as well as satisfying your tool accountability procedure. Hope this helps.