What is the text about?

Read the following text and answer the question!

    Treating and washing stained or faded white fabrics is easy. Before using any new product or method on your clothes, remember to test it in a small, inconspicuous spot first, and to follow the
directions on the label. You should also be sure to consult the care label on your garment to check that it is safe to attempt stain removal yourself and so you know what type of material you are dealing with.

    The following are steps on how to clean white clothes using a washing machine.

1. Clean your machine. It's no good trying to freshen up your white clothes if your washing machine hasn't been cleaned recently, because trapped dirt and colors can add to dulling of white fabrics. If you have a fully automatic machine, run your empty washing machine at a high temperature, adding a cup of white vinegar to the drum to ensure your machine is not only clean but also germ-free.
2. Wash colors separately. The best way to wash white clothes is to wash them separately from dark or colored ones. It's important to only wash white materials together to avoid other colors bleeding into white fabric. Read on for tips on removing color stains below if it's already too late!
3. Hand wash delicates. You may be able to use the hand-wash setting on your machine to remove stains from delicate clothes, but remember to use a suitable detergent and to follow the care advice for the specific item.

(Adopted from: https://www.cleanipedia.com/ae/en/laundry/how-to-remove-stains-from-white-clothes.html (April 21, 2019))

What is the text about?