If I spill something or notice a stain, what should I do?

Often warm water alone will remove spills effectively, but neutral based cleaners such as mild dish soap, Simple Green or similar should be used for tough spills.  Avoid highly acidic or alkaline cleaners as these may etch the sealer or concrete itself, causing more harm over time through weakening the sealer.  Never use abrasive cleaners or scouring pads as these will surely degrade the sealer quickly.