Step 1: Scrape up excess ketchup
Use a dull knife or a spoon to remove excess ketchup as soon as possible after the stain sets. Be careful not to damage the fibers.
Step 2: Check carpet type
Different types of carpets react to different treatments. Read the manufacturer instructions for any special requirements as wrong cleaning methods may lead to carpet discoloration or may damage the fibers. For example, carpets made of natural materials such as grass, sisal or wool can be severely damaged by liquid treatments.
So, if you are not sure for the type of solution to choose, call a professional carpet cleaner.
Step 3: Prepare the solution
As a general rule, carpet-cleaning chemicals should be avoided whenever possible, as they can easily damage carpets or cause allergy.
Usually, the following simple mixture will do the trick of removing the stain. Mix 1 tablespoon of colorless dish-washing liquid with 2 cups of cool water. Stir well.
Step 4: Treat the stain
Whatever cleaning solution you choose, put on rubber gloves and do a patch test. Apply the solution in an inconspicuous area and wait a few minutes to ensure problems won’t develop.
Sponge the stain with a white cloth that’s soaked in this solution. Blot the liquid. Repeat sponging and blotting until the stain disappears.
If the stain remains, mix one tablespoon of ammonia with 1/2 cup of warm water. Sponge and blot repeatedly.
Step 5: Rinse and dry
Rinse the area with cold water. Then, place a white towel onto the spot and cover with some heavy weight. Let it stay overnight. This way you will get rid of any remaining stains.