[header] How to clean concrete countertops [title] Consult your manufacturer's guide or contractor. [step] If you installed your countertops yourself, then keep a photo of the concrete mix and surface coating so that you can consult it for reference. If you had a contractor install everything, then they more than likely gave you instructions post-installation. 
If not, go ahead and call them prior to your first cleaning with any immediate questions. [substeps] Be aware that cleaning your countertops with solutions or methods outside of the approved ones may result in your warranty being voided.