What is an invisible stain?
Many stains that are caused by food, oily substances, or beverages may become invisible when they dry out. But, later on, with exposure to heat they will reappear (a step in the dry-cleaning process). This is caused by the oxidation of the sugar in the staining substance. To increase the chances of removing the stain, it is recommended that you immediately mark the spot where the spill occurred with a piece of tape to make the dry cleaner aware of the invisible stain. On a piece of paper, write what was spilled, and bring it to be cleaned immediately.
