I've talked to several techs in the past few years. It seems the newer guys say no vinegar or bleach down the pipes per new AC standards. The older guys say still put the vinegar down, but never bleach. Be sure to follow it up with 2 cups of hot water. So, guess the best way is to do what you're comfortable with. For now, I've gone the 1 cup hot water down the pipes and nothing else.
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Army/embassy brat - traveled too much to mention
Moved here from SF Bay Area (East Bay)
"There are only two ways to live your life: One is as though nothing is a miracle; the other is as though everything is a miracle." Albert Einstein
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