White Marble solution one: recommendation uses the stone material special-purpose product such as the force concentration cleansing agent which PH value is about 10.5. This kind of product can decompose organic matter pollution on stone material surface and it can eliminate surface protecting agent.If necessary,it can mix cleansing agent with the decontamination medicinal powder.Before using the compound,it tests corner first and guarantees that here will not cause the dark colored mark in stone material surface Mongolia.Solution two:liquid shape drugs is recommended.It had better permeate the stone material first floor, and can filters the contamination and the dust and dirt the surface. The enzyme is especially effective to the vegetative dirt.Solution three: as to bathtub produces dirt around window edge's, the question should leave in these marble never after the protection or maintains improper. Since the performance temperate cleansing agent effect is not good, we recommend with one kind of neutral cleansing agent and the powder become the mud to stick the thick mixture equally well distributed.