How do I clean this? 😕

So long story short.. my daughter brought this stuffed toy to a hotel while we were on a trip. I didn’t want her playing with the toy til I cleaned it after we got back home. It just sounds gross to me to give it right back to her and not clean it after it was all over a hotel room.

Usually when we’ve done this before, I’ve cleaned it by scrubbing with a wet and slightly soapy rag, then with just a wet rag and let it air dry before I let her play with it.

Well it’s been about a month now, I haven’t cleaned it (first trimester has me so exhausted and lazy). I put the toy in the shower so she didn’t see it. I was dumb and put it back in the shower when it was wet a few times and now it looks like it’s created mold ☹️ I don’t know what I was thinking. It’s only on this side what you see in the pic

Can someone tell me how I can clean this toy?

EDIT: thanks guys, throwing it out.. I’m buying her a new one tho bc I feel bad, this was totally my fault. Thank you for the input!