I just started pre washing fabric. I make ex large queen or king sized quilts. I do not trust putting them in a big washer at the laundromat since you don't know what may have been in there. Also they would be exposed to smoke. There are smokers in the laundromat. Our home is smoke free. I quit 12 years ago. We also don't have any pets.
I just take my finished quilts and give them a spin in my dryer.