5s Step 3, Shine (Seiso)
5s "shine" means simply to clean the work area. This represents an ongoing action; you do not clean once, or even weekly, but after each process in the work flow all things are returned to their proper place and cleaned.
A large part of the "shine" step is increasing awareness of the ongoing need to clean and return items to their proper place. You can increase awareness through proper labeling, such as labels and signs indicating proper cleaning procedures, checklists and timelines.
You should also clearly label all of your cleaning supplies, including labeling for any chemical hazards that may exist.