It’s not quite that simple. While cleaners occasionally make mistakes, more often they are blamed for that which is beyond their control. Everything that happens to a garment during its life impacts how it will respond to dry cleaning or washing.
Garment Production: How the garment was made, what trims and/or buttons were used, what inner linings are hidden, how it was dyed or finished, and what fibers were used all have an effect on cleanability.
After You’ve Purchased the Garment: Exposure to light, atmospheric gases, and soils, as well as contact with perspiration, personal care products, food, beverages, and soiled surfaces will affect the appearance of an item after cleaning. Frequently worn clothing may show color loss, as well as thinning of the fabric. These are beyond the control of the cleaner.
During Cleaning: The cleaner cannot always determine if dyes, trims, or materials will respond well to the label’s care instructions. Many stains and color losses present on a garment are not revealed until the item is cleaned and pressed. The only part of the process the cleaner has control over is the cleaning process itself. Yes, sometimes mistakes are made. For example, the system may have too much moisture, which may result in felting shrinkage of wool fabrics, or the solvent could be dirty, which could cause light colors to look dingy. These instances are rare, but they do happen.