When I used this on my baby, I put some on their pajamas instead of directly on their skin. I also found that Vicks has plugins, you put a small insert into the holder, plug it in, and it releases Vicks into their room.
I highly recommend it! Our pediatrician also recommended it as well and we have been using it on our son since he was a newborn and he is three now! When ever he starts coughing and having issues we rub some on his feet and chest. With a newborn we just rubbed it on his feet as that seemed to work plenty and then when he got older we used some more on chest. Great product and safe!