I use a combination of California Wash and odorless mineral spirits. I use mineral spirits on the rubber rollers and California Wash for the metal ones. I prefer the California Wash undiluted for the metal rollers as it cleans more quickly this way. A 50/50 mix of California Wash and water works the same as the mineral spirits for the rubber rollers, but I just use the mineral spirits since it is cheaper. Hope that helps!
