I did it myself. Maybe you did, too. If you’re still doing it, here’s what you need to know: When you take the car seat off the base and put it on the floor inside the house so you don’t wake the baby, your baby can strangle. The reason is that the car seat base in the car is tilted so that the baby’s airway stays 

open. In research published by the Journal of Pediatrics in 2015, 48% of car seat deaths studied were from “positional asphyxia”. Strap strangulation accounted for 52% of the deaths. The takeaway from the study is this: “Car seats should not be used as sleeping areas outside of the vehicle, and children should never be in a car seat with unbuckled or partially buckled straps.”