We have had a warm mist Vicks since DD was an infant. I kept it on the other side of the room from her bed. Its been super easy to keep clean, as long as you are cleaning it out regularly.
Even as a toddler who can get in and out of her bed on her own, she has never wanted to touch it or go near it. We even have a Scentsy candle in her room and she never touches that. So I get that warm mist has the risk of getting burnt with the warm water but keep it out of reach and there won't be an issue.
I got the exact same one at Walgreens for the new baby.