If I’m cleaning the nitro, running the cleaner through and only 1.5 liters of cold brew comes out and 2.5 liters come out of nitro, do I need to add a new keg to flush out another half liter from the cold brew line? Also if I add another keg does that contaminate the whole new keg, or since it’s just running the cleaner out of the line it doesn’t matter? Sorry am dumb