It's not necessary to wash the root of the fleshy meat if it's just bought back. Some people plant it like that and grow it well. So whether to wash the root or not depends on personal choice. But if you don't wash the roots, it will leave danger to you later, because there may be some insect eggs left in the soil, and you don't know when they may cause insect damage, so it's better to wash the roots, and trim the roots by the way after cleaning.
First, connect a basin of water, then hold the meat with your hand, put the root in the water, gently shake in the water, the frequency of shaking does not need to be too fast, the action is as gentle as possible, to avoid accidentally damaging the root system, until you can see the main root of white color, the root washing is finished.
If you plant directly after cleaning, it may cause the new root system to not grow. So it's better to cut off the dead and old roots beside the root system, so as to help the new root grow out and the later growth.