Clean your toys before you use them, including when they first arrive. I wash everything (usually repeatedly & I’ll boil if there was contact with a cat) before I send it out, but silicone has a way of collecting dust and, if you have pets, pet fur, so it’s always a good idea to give your toy a wash with at least soap and water before using it, even if it seems clean.
Also wash your toys after use so they can be stored in a sanitary way. The silicone itself is non-porous and shouldn’t breed bacteria, but that doesn’t mean it can’t transfer bacteria or bodily goo to other surfaces.
If you intend to share your toy with someone else, I recommend one of the more aggressive cleaning methods (boiling, dishwashing or bleaching) before the swap to ensure ultimate cleanliness.
After use, I recommend washing and drying your toy and storing it in an individual container or plastic baggie. Just make sure the container isn’t abrasive, as that introduces a risk of damage to the toy. Many people use large zip-lock bags, and many people don’t pack their toys away and opt to store them proudly on shelves (just make sure you don’t have cats that will try to eat them if going with the second option… true story…).
I do suggest storing toys from different sources separately, as it’s possible for different toys to damage each other. In the same way that silicone lube may damage a silicone toy over time, it’s possible for toys to damage each other over time as well. If it’s made from the same silicone it shouldn’t be an issue and I personally story many toys together in bins, but it’s always better to be safe than sorry, particularly if you can’t be sure your other toys are 100% silicone.
I recommend against storing these toys (especially extra soft toys) on epoxy coated surfaces as they can stick very aggressively (trust me, I know…).