Scrape off what u can with a razor blade. White vinegar should remove what's left.
soap, water, scrub
To remove toothpaste from concrete, first scrape off any excess toothpaste with a plastic scraper. Then, mix warm water with dish soap and scrub the area with a brush. Rinse with clean water and repeat if necessary.
Acid Water
BACK-SET by RoMix states it will do the job.
To effectively clean mold off windows, mix equal parts of white vinegar and water in a spray bottle. Spray the solution onto the moldy areas and let it sit for about 15 minutes. Then, scrub the mold with a brush or sponge and rinse the windows with clean water. Dry the windows thoroughly to prevent mold from returning.
To clean wood stain off concrete, first, scrape off as much stain as possible using a putty knife or scraper. Next, apply a commercial concrete cleaner or a mixture of water and mild detergent to the stained area and scrub with a brush. Rinse with clean water once the stain is removed.
I use one of those straight razor holders and scrape it off.
A good degreaser should work. Also, look into muriatic acid, that is supposed to be a good concrete cleaner.
To effectively clean engine oil off concrete surfaces, you can use a degreaser or a mixture of baking soda and water. Apply the solution to the oil stain, scrub with a brush, and then rinse with water. Repeat if necessary until the oil is removed.
Mixture of 50/50 methylated spirits and water
the best way to clean you concrete floors is with hot and soapy water and lots of hard work
To effectively clean oil off your concrete driveway, you can try using a degreaser or a mixture of baking soda and dish soap. Apply the cleaning solution to the oil stain, scrub with a brush, and then rinse with water. Repeat the process if necessary until the oil stain is removed.