Hello, Depending on what strain of infection you have, it can be very difficult to get rid of, some strains bleach will not kill, I know this from first hand experience.
If you want to kill any infection in your plastics take everything apart especially the spigot like RM-MN said, and soak everything that came in contact with that brew in a 50/50 mix of Hydrogen Peroxide and water for a full 3 days.
This method and this method alone is how I killed the infection in my plastics, bleach bombing and soaking in StarSan didn't do anything to the bug I had.
I hope this helps
Bartender Ill have what the gentleman on the floor is drinking.
I have spent more $ on brewing equipment than my truck cost!
Green beer sucks, let it age/condition/finish and become great before drinking it. WileECoyote
Good/Great beer takes time! if you want a quick beer go to the store or bar!
Things come and go. Good beer will live on for ever ! WileECoyote