Breathable Cover for Stroller

"Should I be using my blanket to cover my stroller?  It seems that my baby is getting hot."

My suggestion is to get a breathable cover for your stroller rather than using a blanket.  The reason is that baby does get hot under there.  Picture yourself in a plastic seat, with cushions on the back and all around you, then cover that with a blanket.  You would be very hot, especially when you consider that you would be breathing your own exhale.

Order a breathable cover for stroller

It is way better to get a breathable cover for your stroller to protect your baby from the sun rather than using a blanket.  The idea of covering them in the first place is simply to get them out of the sun.  You don't need to cut their air off while doing that.