TimT said:
Cleaning is bloody annoying so I'm just waiting for someone on this thread to say, 'yeah, just bung it in there and don't worry about cleaning up the previous brew, it'll be fine', and that'll be my permission.
After you rinse out with whatever - Starsan, sodium percarbonate, or something else - you've got to dry it out. Stuff will always get in in that time between drying out and adding the wort. So though you can minimise risks you can never effectively eliminate them. Trying to eliminate bacteria is like fighting with an invisible world champion wrestler.
Anyway, most important thing for a healthy brew, I'd say, is a good wort and healthy yeast. Once the yeast really gets going it provides a very effective safety blanket of its own (protective layer of gases).
I assume you don't know, Starsan, as with some other sanitisers, are no-rinse.
Sanitizing is about starting with a clean environment, and maintaining it. I've had a lot of brews from proud brewers and thought they were infected. Years back there was a rule I read on here often.
4 Step of sanatising
1. Clean
2. Clean
3. Clean
4. Sanatise
You cannot sanatise a dirty environment.
I've used a fermenter for 6 months straight without re-sanitizing it, and do it for many brews often I brew on prior yeast cakes, so a good healthy batch of yeast to wake up immediately. But as soon as the keg is full from the fermenter, I dump excess yeast and pour in a fresh cube. If the prior beer is not infected from the fermenter, then the fermenter is safe.
Same as my kegs. When they blow, I leave them in the fridge full of CO2. Next time I need to keg beer I have a keg full of CO2 that a quick rinse and refill can be done.
BUT, I would never think of grabbing a dry fermenter and just filling it. I always soak them in napisan and then a good hit of starsan before putting them back into use. Same as my kegs if they have been un-used for a while.
Napisan is a brewers friend. Soak fermenters, I keep my cubes full of it. It keeps them clean and sanatised. Dump it, a quick rinse and then spray with starsan and you are back in business.
Also depending on where you live makes a difference. If you live in the middle of fruit trees life has just got tough.