How to clean linoleum grout?

You clean the whole floor the same way. If the "grout" part is indented, you can use a scrub brush.

Home Depot/ Loews sells Linoleum cleaner. Armstrong Linoleum cleaner. It’s very caustic . But it will clean it ! Please wear gloves. You can put it in a spray bottle and use a bristle brush w/ handle. Then needs to be mop to remove residue.

Use a bleach pen.

Have you tried baking soda and hydrogen peroxide? Tough scrub brush helps too: https://www.hometalk.com/diy/clean/bathroom/diy-grout-cleaner-44693701

Hello, hope this helps you out. Most of the buildup on my lino was from wax or floor shine, it turns dirty looking in the grout depressions, you can clean it with a stiff brush or even a toothpick on the finer lines

Once or twice a year, a deeper cleaning is needed to remove dirt that has become embedded in the surface and restore the natural beauty. The best way to clean linoleum floors on an annual or bi-annual basis involves a series of steps and the following materials:

• Vacuum cleaner
• Soft-bristled brush
• Microfiber mop
• Bucket
• Hot water
• Baking soda
• Mild dish soap
• Old towels

Step-by-step instructions:

1. Sweep or vacuum loose debris.
2. Sprinkle baking soda on the floor.
3. Mix one gallon of hot water, one cup of vinegar, and a few drops of dish soap.
4. Mop the floor with the solution, using the scrub brush to remove stubborn dirt, or in high-traffic areas.
5. Once the entire floor has been cleaned, mop once more using clean water to remove any remaining traces of baking soda or soap residue.
6. Dry the floors completely using old towels.

Clean it the same way you clean the rest of it. If the grout lines are indented, use a soft scrub brush to remove any dirt.

DIY mixture, make a paste of 3/4-cup baking soda, 1/4-cup hydrogen peroxide and 1 tablespoon of mild dish soap. Apply the paste to the grout with a grout brush and scrub the grout.