Just clean the stone with soap and water, and every 3 months use ur stone sealer
Best practice is to wipe down the counters every day to minimize the possibility of staining...if staining does occur it's best to contact someone to address it...sealing is good to be done at minimum once a year but no more then 3 times a year would be needed and you can use countertop sealer from your local home depot or lowes
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