Any recommendations for nasal aspirator, or the pump to suck out the mucus? I'm using the nuk but like not super effective cos my LO nose still stucked after use...

You can consider this Lucky Baby Easi Clear Nasal Aspirator: https://www.babymall.com.sg/lucky-baby-easi-clear-nasal-aspiration.html Place the white tip at your baby's nose (after applying a few drops of saline solution) and remove the mucus by sucking on the other end.