Now the fun beings! Let the wet chair sit until the stain disappears. For my red wine stain, it took about 20 minutes. Don't be alarmed if the spot turns a few different colors along the way. For example, red wine usually goes from purple to black, to brown, to nothing. If you find that your stain does not seem to be going away, feel free to give it another hit — just be sure that the rest of the seat is still wet too.