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Grout is the material that fills the spaces between tiles on floors and walls. Over time, grout can become dirty, stained, or discolored from mold, mildew, and everyday use. Keeping the grout clean is important for both hygienic and aesthetic reasons. Dirty grout takes away from the overall look of a tiled surface. Fortunately, there are several effective methods for cleaning grout.

Assess the Situation

Before choosing a cleaning method, inspect the grout and assess the type and extent of buildup. Is it just surface dirt and stains? Or is there mold and mildew present indicating moisture issues? Identifying the type of grime will determine what type of cleaner and application method to use. Also, consider the grout color. Using too harsh of a cleaner can damage or discolor grout.

Vacuum and Sweep

Start by using a vacuum attachment or small broom to remove any loose debris or dirt sitting on top of the grout. This prepares the surface for more extensive cleaning. Pay close attention to corners and edges where debris often accumulates.

Mix Baking Soda and Vinegar

For lightly soiled tile grout, try mixing baking soda and vinegar into a paste. Apply the fizzing paste onto the grout with an old toothbrush and let it sit for a few minutes. Then, scrub the grout gently with the toothbrush. The baking soda and vinegar solution will break up dirt and lift some staining while being safe for most grout colors. Rinse thoroughly with water when finished scrubbing.

Use Commercial Grout Cleaners

For moderate to heavy grout soiling, use a commercial grout cleaner designed specifically for the type of grout you have. Carefully read product instructions and test on a small, inconspicuous area first. Some cleaners can contain harsh acids or bleach that can ruin tiles or discolor grout. Apply the product to grout joints with a toothbrush or specially designed grout brush. Allow it to sit for the recommended dwell time before scrubbing and rinsing.

Steam Cleaners

Heated steam is very effective for cleaning heavily soiled grout. The steam helps loosen and lift dirt, grease, and stains from deep within the grout. A steam cleaner uses hot vapor at high pressure. Steam cleaners can be rented or purchased. Be sure to select the appropriate attachments for grout. Move the steam cleaner slowly along the grout to thoroughly penetrate and sanitize. Some repeated applications may be necessary for extremely dirty grout.

Re-Sealing

Regular re-sealing is recommended after deep cleaning grout. Sealing grout creates a protective barrier that resists new staining. It can also make routine grout cleaning easier. There are several types of sealers available, including water-based, solvent-based, epoxy, and urethane formulas. They vary in durability and ease of application. Consult manufacturer guidelines on reapplication frequency as it depends on sealer type and traffic.

When to Hire a Professional

Extremely dirty or moldy grout may require calling in a professional cleaning service. They have commercial grade equipment, high-powered steamers, and strong chemicals for the toughest cleaning jobs. Professionals can also completely re-grout floors and walls by removing old grout and replacing it with new. This is recommended when grout has deteriorated too much or prior improper sealing has caused extensive staining.

Prevent Dirty Grout

Regular light grout cleaning is easier than infrequent deep cleaning. Sweep or vacuum tile floors often to prevent dirt buildup. Mix mild soap and water for periodic wiping of the grout. Apply grout sealers every 1-2 years to protect grout from stains. Ensure spills are cleaned up quickly. Address any moisture issues behind or under tiles to prevent mold growth. With routine care, grout can stay clean and bright for years before needing a heavy-duty cleaning.

Cleaning and maintaining the grout lines between tiles promotes a nicer looking floor or wall surface. While it can be labor intensive, utilizing the right methods and tools can make the process easier. Consistently caring for grout also prevents more extensive cleaning later on. With some periodic effort, the grout can look nearly as nice as the day it was installed.