I also had the misfortune of letting it get so full where the tub filled, glad to hear it stunk bad for you too. I was worried that it was mixed up with my black tank. I didn’t think the grey water would be so nasty, but it’s probably not been cleaned since 1998.
Has anyone ever used Happy Camper Extreme Clean? I understand it can be used overnight and dumped out in the morning instead of driving around to agitate it because the motorhome will be stationary for a few more weeks. I really want it to not smell as bad like that if the tub ever fills up again, so I’m kind of motivated to purchase such an expensive product.