Chlorine Bleach is a much more effective antimicrobial chemical at an acidic pH value than at the alkaline Ph value at which bleach is manufactured and stored. A small amount of household vinegar is sufficient to lower the pH of bleach to an acidic range. Diluted bleach at an alkaline pH is a relatively poor disinfectant, but acidified diluted bleach will virtually kill anything. (HOCl is about 80 to 200 times more antimicrobial than OCl-)
It also lets you bring down the chlorine levels to where you can not taste nor smell it and still kill and sanitise, hence no-rinse.
Hot water will neutralise chlorine. Hence I still do a hot water rinse even though I shouldn't. Old habits are hard to get rid of.
Biggest bottle of no name generic white vinegar cheap from your local supermarket is all you need. Keep the malty stuff for your fish and chips!
FFS, If you are still doing a HW rinse then why are you adding VINEGAR?
Vinegar is 99% organic material (a very small proportion of that is acetic acid). By adding organic material to your bleach solution you are effectively reducing you sanitising ability of your bleach (bleach "fires" its free electron at organic material). What you gain from acidification you lose in effectiveness at these low dilution rates.
I maintain there will be significant levels of acetobacter in ALL vinegar products.
cheers
Darren