1. Regularly use a vacuum cleaner to wash the dust, otherwise it will take too long to be too much dust and it will be difficult to handle.
2. When a stain is found, clean it with a towel and clear water. Remember to wring out the towel and remember not to cover the wet towel directly on the wall.
3, the photo on the wall can be gently wiped with a tissue or towel, if not a lot of dust, it is best not to use water. When using water, remember to wring the towel so as not to damage the quality of the photo.