As with all tricky spills and stains, the sooner you can remove the spill, the better the results. Your first step is to absorb as much of the liquid bleach as possible by dabbing the area with a clean cloth or absorbent paper towel. Remember to wear gloves because the hydrogen peroxide in the bleach can harm your skin.
Once you’ve removed as much excess liquid as possible, mix a quarter of a teaspoon of dishwashing liquid with one cup of warm water. Conduct a colourfast test on an area of carpet that is usually out of sight. If there is no discolouration, apply the solution directly to the area where the bleach was spilt, working from the outside in, and leave it to saturate deep into the carpet pile for at least five minutes.
Blot with a dry cloth but do not rub the carpet, because rubbing can damage the pile. Rinse thoroughly with clean water and cover the site with several layers of paper towels to absorb any excess moisture. Place a heavy object on the absorbent layer and leave overnight. Vacuum and agitate the carpet with your hand to restore the lustre and texture of the pile.
If the stain persists, mix two tablespoons of white wine vinegar with four cups of warm water and follow exactly the same process as above. If that doesn’t work, it’s time to think about re-dying or removing the stain altogether, using one of two simple DIY techniques.