The idea of using other cleaner than pure ethanol is this: with one alcohol bottling line it is possible to bottle several products, like brandy, flavoured vodka, biter. For example when brandy is bottled you have to wash bottling line pipes with pure ethanol. If you do not do that, the trase of brandy will be in other bottled product - and it is not good.
Is isopropanol siutable for this? It has very strong odor. Will it not leave any trase in bottled alcohol beverages?