I'll go out on a limb here: you probably wouldn't operate your
home washer the way ordinary cleaners operate their dry cleaning
machines!
That statement may sound harsh but it's not. Especially when you
consider that the vast majority of ordinary cleaners
- mix dark and intermediate colored garments
- mix light and intermediate colored garments
- mix red, black and other dark colored garments
- mix regular and fragile garments
- load their machines to full capacity
- add or inject moisture into their dry cleaning system
- reduce the length of their "wash" cycles
- increase the temperature of their "dry" cycles.
This produces the fastest and cheapest -- and worst -- dry
cleaning. What I call "ordinary cleaning." And what ordinary
cleaners call "exceptional" or "award winning" cleaning.
A true quality cleaner will run their dry cleaning machines
quite differently from ordinary cleaners.
At RAVE FabriCARE, for example, we always scrupulously sort our
garments into at least 5 like-color classifications, and at least 2
fragility classifications. We never add moisture to our dry
cleaning fluid to control any possibility of shrinkage. 
We
always underload our machines to ensure maximum soil removal and
reduce pilling. We always extend the length of our wash cycles for
maximum soil removal. And we always dry at lower temperatures to
further control any possibility of shrinkage.
What's more our dry cleaning machines even have completely separate
filter systems for light/intermediate colored loads and dark
colored loads.
By contrast, the dry cleaning machines at many ordinary cleaners
have a single filter system. This means that the dry cleaning
solvent or fluid from both their light/intermediate colored loads
and their dark colored loads flows through the same set of filters.
As a result, some of the dye residue from their dark garments that
accumulates in their filters will eventually find its way onto your
light/intermediate garments.
The result?
Whites, creams and pastels that are grey and dingy.
How can I help you?