I made my first batch of mead a few years ago, and it tasted like nail-polish remover when I first tasted it. I put it away and forgot about it, then pulled it out about 6 months later when looking for something to drink, sampled it more out of masochism than anything else, and it was sweet, rich, and tasted beautiful.
My most recent batch tasted similar at first tasting, but its now about 18 months later, and it still tastes that way. I think I under-sugared it, but don't know for sure what I did. I made a split batch, using 6 different yeasts and some with some fruit, and they all taste this way, so I'm pretty sure I did something wrong, and it's not just a batch gone bad.
Is there anything I can do to try to save it at this point, or is it time to pour it down the sink and try again?