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Every 1 Or 2 Weeks
Weekly or biweekly, you should deep-clean the grout. This porous material easily absorbs dirt, grease and other stains so you need to keep it clean if you don’t want dingy-looking floors. While there are commercial grout cleaners, you can also create your own solution of mild bleach. Allow it to sit for 10 minutes, then scrub away using a toothbrush or a small scrub brush. Baking soda and water paste also helps remove grout dirt, but it needs more time to take effect. Leave it on overnight then scrub with a nylon brush. Once the grout is dry (air dry; don’t use blow dry or anything else!), you can put on a grout sealer to prevent stains and dirt from accumulating again. 
Once A Year
Speaking of sealing, you can do this at least once a year so you can save on your effort, money, and time. However, the frequency may vary depending on your ceramic tile’s porosity and location or foot traffic it receives. The grout between floor tiles should be sealed on a regular basis. To seal the grout, consult with your designer, supplier, or the grout manufacturer first to determine the most appropriate sealant for your ceramic tile floor. Once this is cleared, make sure it’s clean and dry. Then, apply the sealant according to the instructions on the label.
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