a couple of useful things that i learnt from the
basic brewing podcasts (no affiliation blah blah):
iodophor does not sterilise, it sanitises, not sterilise. the difference is that sanitise = kills 99.9% of bacteria/organisms on the item and sterilise = kills 100% of bacteria on the items.
as far as chemical sterilisers go, there aren't any that are suitable for home brewing, coz a lot of the ones that are out there are concentrated acids which need to be rinsed off well if the equipment is to be used for brewing, then the whole purpose of it is lost. iodophor, sodium met, star san and pretty much all other chemicals out there for this purpose are sanitisers.
as far as the high pressure steam goes, i am not sure, i have a feeling that it may be a steriliser, but could only be a sanitiser (some viral or fungal spores or cysts are incredibly resilient to environmental changes.
one method that i am pretty sure does sterilise bottles, if done correctly is dry heat sterilisation.
-what i did for my bottles was after i had cleaned them out with my cleaning product (to get rid of the chunky bits and flies) and let them dry (important that they are dry), i put aluminium foil 'caps' over the tops to stop nasties from getting in after/during the baking.
-then i shoved them in a
non-preheated oven (very important that) and turned the temp to 100 degrees celcius, non fan forced, and waited for it to reach that temp. when it reached that i left if for 5 mins then turned it up to 150. when it reached that i again waited for 5 mins. then i turned it up to 180. when it reached that i left it for 30 mins. then i turned it up to 220. when it reached that i left it for 10 mins, then turned off the oven.
-at this point you must leave the oven
closed until it reaches room temp on its own again (about 6-10 hours, i just left it overnight). then, without disturbing the foil caps, you can store your bottles any way you want to until bottling day, confident in the fact that, if required, these bottles would be clean enough on the inside to perform surgery with. note,
**NOTE** this does not work too well with PET bottles.
-i did this with 60 heineken stubbies and they all came out perfect.
short of some of the bacteria that inhabit hot water geysers or sulfur springs, you can be relatively confident that this amount of heat for this amount of time will kill all bacteria/organisms in/on your bottles.
Comments on my method welcome
Lobby