It is a fact. Rubber toys will absorb some of your bodly fluids, no matter what. Even the "jelly" type of plastic will do so, although not so much. It is a small price to pay for the comfort of the added softness. They have to be thoroughly cleaned after each usage and are not to be shared, ever.

All this means your toys will have to be replaced more often than hard plastic ones. (well, it depends on how often you use them). Some times I wish I bought some shares in the company that makes them, I would get some of my money back!