a 1 year old baby that is chesty?

Consult doctor for proper diagnosis. If not treated properly there is a danger of worsening symptoms which may be severe or even life-threatening. Meanwhile, take your baby into the bathroom. Close the bathroom door and run the shower on hot for a few minutes, and stay in the bathroom to let baby breathe in the steam. Do not stand under the shower. The heat and steam from a hot shower does wonders.