I'm convinced that you can ruin your beer by making the iodophore too concentrated. My first batch with iodophore I wasn't super careful about how much water I was using to make my sanitizing solution, and, I was shooting for the 25ppm instead of the 12.5ppm. My final beer had a noticable cleaner aroma and taste to it. It was drinkable and we drained all 5 gals but I wasn't proud of it. I wasn't exactly sure what it was until I was making my sanitizing solution for my last batch. I was much more careful this time. In fact I used my fermenting bucket with the gal marks to fill to 5 gals and put in 1 1/2 capfuls. It actually says to use 2 capfuls for 12.5ppm but I was too chicken after my last batch. After I emptied the fermentor prior to filling with wort I took a big wiff inside the bucket and it smelled exactly like the off aroma I'd had in my previous beer. So I rinsed out the bucket before I filled with wort. It's supposed to be no rinse at 12.5ppm but I could still smell it. I think the key here is that even at 12.5ppm we still need to allow it to dry. Anybody think different?