Referment DetailsWhy referment?
It's not you're fault the fermentation stuck, so don't feel bad. But you're probably responsible for fixing it, so get to work!
Wine with residual sugar is an invitation for spoilage organisms and a headache to have in the cellar, so it's better to referment and get the wine dry than deal with the alternative.
It's best to understand why the fermentation stuck to know the best route to referment. If you're not sure why, take a sample to an outside lab and ask for their advice.
The procedure presented here is not by any means the best or only option, it's just one that I've found works consistently over the years. Pay attention to detail, though, as timing and dosage are important for the referment to have success.