The downside is the foam cleaner itself. While being pretty economic and ecologically sound (no bottles to throw away), the Dirt Foam from Moose didn’t have the dirt-stripping power I was hoping for. After a five-minute soak I washed a couple of bikes without the pressure washer to see how well the cleaner worked. There was still a bit of dirt residue that a pressure washer or scrub brush would easily remove, but the foam alone with a standard hose didn’t cut it. Also, I’m being super lazy here but it’s in the name of science.