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Hi, we have a pot still and are distilling on the grain and we've noticed a silver metallic build-up that will occur after just one run of our 250 gal still. Does anyone have any experience with this? Otherwise the quality of the spirit seems good, but because our still is 1/2 the size of our fermenters it would be ideal if we could prevent this so we don't have to break down and clean between every stripping run. Other spirits (apple brandy and gin) have been run through with no similar problems. I've attached a picture of the lyne arm after a single run. We suspect there may have been some carry over, but we know there was none in the second run and we had the same problem, despite a thorough cleaning of the still. Thanks, Eli