Put it on the bottoms of the babies feet and put socks on. Does wonders. I did it once in the morning and before bed. 

They make all natural Vicks if you're worried. And you can always ask a pharmacist when you go pick it up.

Yes it's a thing my mom did with me and my grandma did with her. To put the Vicks on the feet then the put the socks on...

I didn't use it till she was 1. If you must out a little bit on her back between where her lungs would be. Good luck also run a steam shower/bath and let her inhale steam for 10-15 min 

I put it on every couple hours