My girl had frequent blocked nose during her first 3 months too. We prefer using nosefrida https://www.pupsikstudio.com/nosefrida-aspirator-bundle-set.html to manually suck out her mucus. Avoid putting baby in aircon room, we used a humidifier for more moisture in the air. Warm baths also help coz the heat can help to loosen the mucus (makes it easier to remove) i also bought sterimar 100% natural seawater to spray up her nose to soften the harden mucus before sucking them out. Tried to use lollababy electric nasal aspirator, it's good if mucus is runny but I find the manual one clears the nose better. Just my personal experience! Hope it helps!
My daughter has the same problem. She's 1 month 8 days. Polyclinic doctor prescribe nasal drops and it works well.
Yes
Avoid strong Aircon wind. Just fan if Los
Just fan if possible
Yang Shu Wen