Baddabing-baddabump!
I've done 4 kit beers now, coopers aussie lager, coopers irish stout, coopers cerveza and woodeford's wherry. All bar the stout have had the homebrew tang, and I'm beginning to wonder if it's me.
I've used all brewing sugar, extract/sugar mixes, two can kits with no added sugar. For the wherry I added a campden tablet, but the tang is still there, albeit less so.
It doesn't seem to get better with age. My last aussie lager bottles was drunk around 6 weeks ago, and that had been in the bottle for a few months.
Only things I can think really are, changing from VWP for cleaning, something which I've started doing for wines, but not for beer yet, or controlling fermenting temperature more, either with an old fridge, or water bath.
Has there ever been any discovery for what the tang is, and why it occurs in homebrew? I'm moving to all grain very soon once I've built up the gear, but would hate to go to all that effort and find the tang still there!