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Add about 2 tablespoons (30 mL) of a mild dish detergent to a bucket of warm water, then stir to mix them. Dip a stiff-bristled brush into the soapy water, then scrub the affected area. Rinse the brush in the bucket often to keep the brush clean as you scrub away the mold. Remove as much of the mold as you can. The root of the mold will likely remain on the surface, even if you don’t see it. However, scrubbing the area with soap and water will make it easier for the cleaning product you use to penetrate to the root of the mold and kill it. Use a spray bottle or sponge to apply the solution to the moldy area. Go over the area several times to make sure it’s fully saturated. You want the cleaning solution to penetrate the mold to effectively kill it. You don’t need to scrub the area at this time. This gives the treatment time to work. Harsh treatments like bleach, hydrogen peroxide, and ammonia typically work quickly. Alternatively, natural treatments like white vinegar, baking soda, borax, and tea tree oil often require longer to work. You may want to periodically apply more cleaner, depending on the surface you’re treating. If the liquid cleaner seems to be pooling below the mold-affected area, you may want to add more cleaner and soak up the excess liquid. If you removed all of the mold when you scrubbed the area with soap and water, then you don’t need to scrub. However, it’s best to scrub if you have lingering mold or a mold stain. Use your stiff-bristled brush to work the cleaner into the mold. Rinse your brush often to keep it clean. If necessary, you can apply more of the cleaning solution you’re using as you scrub the area. However, don’t switch cleaners, even if you’re unhappy with the results. You don't need to rinse the area unless you prefer not to leave a residue. However, you do need to dry it. If you want to rinse the area, use clean water to remove the remnants of the cleaning solution. Then, pat the area dry with a clean towel. To speed up the drying process, blow the area with a fan. If you are unhappy with the results of your cleaning process, you can try again. However, before you try a different cleaner, thoroughly rinse the affected area to remove any remaining residue from your cleaning solution. Then, let the area fully dry before you try again.
Scrub the mold with soap and water to clean the surface. Apply your cleaning solution to the mold to kill it. Allow the cleaner to sit for 15 minutes to 1 hour so it penetrates the root. Scrub the surface with a stiff-bristled brush, if necessary. Rinse and dry the area.