Originally Posted by cyclonetx
I am assuming my last batch was infected (gushing bottles and bad taste). All of my nice swing top bottles have a film that won't budge after a day of soaking in water. Any suggestions about how to get my bottles clean is greatly appreciated. Also, would a switch from StarSan to iodophor be an issue? This is the first time I have had this problem.
I use TSP (trisodium phosphate) to clean all my equipment, buckets and carboys, and I soak them in this solution for at least 20 minutes, then rinse really well, and then i use iodphore to sanitize.
According to the manufacturer, iodophore needs only 3 minutes to kill everything it's gonna kill, but I leave things soaking in it as long as possible, just to be safe.
Iodophore does stain plastics pretty badly, but I find that the TSP actually removes that stain after a good soaking, which I like, because i know it's doing something, so it's kind of an indicator.
I finally figured out the source of my infection.
If you look at the picture, you'll notice the scum on the top is only on the left side, it baffled me a bit, so I looked really close and found that actually, it is creeping down the inside of the bucket from the top, and then spills out onto the surface of the wort.
I then realized that when I poured the liquid Festa wort from the box, i did so on the left side, right where that infection seems to start.
Looks like even though I actually sanitized the spout of the wort container, something not sanitized made a bit of contact with the cardboard box or an unsanitized part of the plastic bladder inside the Festa box.
I knew it had to be something like that!
Amazing how little it takes to cause an infection. Makes me want to wear an NBC safe suite outside now, haha.
At least now I know, and I'll be MUCH more careful next time.