In that case, the red color is completely from oxidation and degradation. After so many bleaches , Dgum’s, scrubs and dewaxing… you’ve removed any UV protective molecules like lipids that actually in small increments help slow down the degradation process. My opinion is to do less scrubs, obtain a reasonable faint yellow color and call it a day if you care about shelf life. I do my short path runs for mass production Liters not carts. So a small yellow color, higher purity and longer shelf life is more important to me than water clear and oxidation problems. I’m sure you’ve heard this before… but the best way to stop degradation is to achieve you desired color… and after your distillate is finished… put in a vac oven to remove all possible atmospheric molecules and store is like that. Don’t run a continuous vac.(obviously unnessary once you’ve reached a fully evacuated chamber).