Preferable hand wash:
hand or machine wash (gentle cycle; 30C/85F) with mild soap for delicate cloth. Do not use bleach or stain remover. Wash separately. Do not wring. No machine dryer.
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Stamps user manual
Put paint on the working surface of the stamp with a sponge or a roller and make an imprint on fabric/paper.
Use only paints intended for these purposes.
Make an imprint on soap or clay by pressing a stamp on the material.
After use, wash the stamps carefully, dry with soft cloth and leave at room temperature (20-30C/70F-85F)