Took my dry cell on a 5 hour ride and when it was over there was some blackish brown sediment in the reservoir. Open close inspection is appeared that it was metal sediment. I also noticed fairly heavy pitting only on + side of plates ( almost looked like it had been etched). Has anyone else noticed that KOH can do that? Is it a factor of KOH even or something else. Right now the plates are 304L stainless.