How to clean up the 2002r cloud rain ash?

1. Tools for cleaning first: a clean and dry square towel, a common toothpaste and a clean and intact toothbrush.

2. Then soak the square towel until it is half dry and half wet, and wipe the dirty place with the half wet square towel. You can wipe the edges of your shoes back and forth several times.

3. Finally, wipe it with a wet square towel, clean the toothpaste and dry it.