The steps are as follows:

1. Put 200ml vinegar into the basin, soak the towel, and then put the towel into the washing machine to dry. Let the washing machine stand for one hour after drying. Because the dirt is hidden in the wall of the inner cylinder of the washing machine, the vinegar can reach every part of the inner cylinder of the washing machine evenly by rotating.

2. Dissolve 50g baking soda in water, then fill the washing machine with water and add the dissolved baking soda.

3. Turn on the washing machine for 5 minutes, let baking soda reach every dead corner of the inner cylinder of the washing machine, and then let it stand for 2 hours.

Principle: Vinegar is acidic, which can decompose the scale and stains accumulated by the washing machine for a long time. Air drying the towel soaked in vinegar will not only volatilize the taste of sour vinegar, but also soften the scale and stains inside. The component of baking soda is sodium bicarbonate, which is weakly alkaline after being dissolved in water and has the function of cleaning and deodorizing. It can also soften the water quality and prevent calcium and magnesium ions in the water from forming water-insoluble soap scale and decomposing to form scale and dirt. So as long as these two artifacts are used reasonably, the washing machine can be cleaned.