How to wash black rubber shoes?

Leather cleaner shall meet the following requirements: PH value shall be between 5 and 7.5 (not more than 7.5), and it shall be oily (can be tested by combustion method: burning leather oil on toilet paper), and it shall not contain skin injury cleaner and solvent. There is a special cleaning liquid for cleaning leather, which is sold in some big supermarkets. Wipe gently with cotton balls or cotton gauze, and put it in a ventilated and cool place to dry. Don't wash it with water, let alone brush it! !