Prepare cleaning supplies such as rubber hand cloves, clean cloths, chemical, abrasive pad, squeegee and bucket.
Scrub the wall tiles with abrasive pad with solution of click NF diluted in warm water.
Rinse the tiles with water hose or a moisturized cloth and pad attention in particular areas of electric socket and switches.
Dry in particular areas around electric sockets and switches.
Dry the wall fast with a clean cloth or squeegee for large areas and check whether it has no oil, no soil, no dust and no chemical residue on the cleaned wall.