Critiques so far + a way to clean foam?

Sorry for the many submissions lately. ;o;

So, I'm working on my 4th mask, a cow. Does it look like a cow to you? P:
Also I have questions about cleaning and disinfecting foam.






This mask has a moving jaw. Ignore the eyes/eyebrows, I drew on my mannequin head because I'm getting a cfx head tomorrow. ;w;


Now, about the foam. I have some not-so-cheap high density green foam (as seen on the ears above). I have a large sheet of it, which I recently discovered was... soiled. The cat threw up on it, and somehow ended up all over the middle of this foam sheet. Luckily I had some big scraps I made the ears from.
Is there a way I can clean and disinfect the foam sheet? Or should I just waste it? ;-;