I touched my friend's vibrator

My best friend of 3 years invited me to her place this afternoon, and I was sitting on her bed just chatting.

I know she isn't the cleanest person and her room is always messy but didn't think too much about it.

As I leaned, my hand grazed on something rubbery. I thought it felt like a vibrator without looking but I didn't tell her.

I thought, okay I will just wash my hands and not mention it.

But then as I stood up I saw that it was indeed her vibrator, and it was really crusty with dried up fluids. It's obvious she never cleans it! It wasn't a few crusts, but it was all over and stuck to the engraved parts.

I thought this was really nasty and not good for her health to not clean it and leave it on your bed after use. And she need to put it away if she was inviting people over. As her best friend, I don't know whether I should tell her about it which will be awkward, or just let it go.