Wash painted surfaces with a mild detergent to remove all dust, dirt and grease.

Then clean with a soft cloth and sponge dipped in mild detergent.

But because they require occasional cleaning with mild detergent, you could always use them to sing in the shower.

Proper care means washing it with a mild detergent or a glass cleaner.

Also, one should not use cleaning solutions or mild detergents on the stones, as they can damage the stone.

Then, using a soft toothbrush and a mild detergent like Palmolive, clean the stone under hot water.

Dip a cloth into the suds of a mild detergent.

Use a sponge floor mop squeezed out in mild detergent, then rinse with clean water.

Most outdoor flags can be washed in mild detergent and thoroughly rinsed.

The only maintenance required is an occasional wipe over with a mild detergent.