How about in a bottle steriliser- if its a hard toy?

Is it only plastic or also textile? I would use some disinfectant wipes for the plastic.

Use milton tablets or solution its an anti bacterial use on water to make tius ckean

We use wipes

Maybe try a dettol type wipe or spray with a glen20 type spray then wipe over woth a regular wipe… hope this helps.

Soap and warm water

I’d usually suggest a baby wipe, but that may not be enough if you’re not sure about it. My e hang it out of baby’s reach.