The practice is wrong or not fermented well.

Here's how to make wine for reference. First, prepare the ingredients: 500 grams of grapes, 200 grams of icing sugar, and a spoonful of flour.

1, in a large pot pour the right amount of water, and then add a spoonful of flour, and then put the grapes in to clean.

2, fish out the cleaned grapes and dry the surface.

3, the dry water of the grapes pinch broken into a glass container, a layer of grapes a layer of icing sugar put until eight points full.

4, put to eight full, sealed and preserved, put to a cool place, silent 15 ~ 30 days.

5, 15~30 days later, the first fermentation of wine is good, filtered through the grape pomace.

6. After filtering, put the wine back into the container and keep it tightly closed for 2 to 3 weeks for the second fermentation, which will produce a small amount of fine bubbles.

7, the second fermentation is good after the wine becomes particularly clear, re-filtered once you can drink.