As specified in our care instructions, we do not recommend to keep our products on water or humid places for long periods of time. Since it's a natural product, mold may appear if the product if it is not being well used.
Toys should be cleaned with soap and water and dried thoroughly after each use.
We do not recommend cleaning toys with bleach or any other product other than soap, nor do we recommend sterilizing them, as they are made of 100% natural rubber and their shape or color could be affected.
Please check here our care instructions to make sure your toy last for a long time in good shape :)