mitter washing
I have washed them in place with the power washer with the cloth against a sheet of plywood or with one person holding them taught. I have also taken them down by the rack and tried washing them four at a time and flipping. The result was not great. The dirtiest cloth is the part that does not get agitated as much. Driving through my own tunnel and looking for the discoloration, I doubt the customer even notices. But for foot traffic or just for my own sense of clean and ship shape, I'd prefer they look blue again.
Thanks for the advice