https://www.amazon.co.uk/dp/B00171WXII/ref=cm_sw_r_as_gl_api_gl_i_N0BJA416RF6Y12PGPK05?linkCode=ml2&tag=tiniesandco0f-21
Aww it’s hard isn’t it. We have a 2.5 yo and 4 week and my newborn caught her cold in the first few weeks of coming home. For the newborn I used the Sterimar Baby Nasal Spray, safe for newborns combined with the Snufflebabe Nasal Aspirator to drag the mucus out. Worked well for congestion. That sucker is amazing. For the last toddler, try propping them up a bit at night from the head. I put a small folded towel under the head of the mattress to elevate the head slightly to help with breathing. You can also use the nasal spray and sucker on them too. And Calpol is also my go-to! Espesh for teething! And the teething powder works rubbed on gums too. 🙏🏻
If he’s bunged up have you tried the snot sucker? They’re pretty gross but they work in terms of clearing the airways?