The ketchup stains on white clothes can be cleaned by taking the following steps:

1, when the clothes are dry, hand wash laundry detergent is applied directly to the stains;

2, do not wash right away, the clothes will be left for 5 minutes, and then gently scrub;

3, after the above scrubbing, the ketchup stains on white clothes have been removed. Finally, the whole piece of clothing can be cleaned.