If it is a model finished in microfiber or synthetic leather, you can clean them with neutral soap on a damp cloth directly applied to the stain.
Do not put in the washing machine, only the insoles separately. Clean with soap diluted in water with a soft bristle brush. To clean the sole: fill a quarter of a glass of water with ethyl alcohol and the rest with water. Gently rub this mixture with a rag. Let dry at room temperature. Extra recommendation: make balls of paper and put them inside the shoes to absorb moisture and keep their shape.