Hey GM!
I do the old-fashioned way. It works excellently, and it gets out tons of mucus, but it is hard on the parent emotionally to do so once you hear, you may want to buy the below products mentioned! :)
I make a homemade saline solution with 8 oz. purified water, 1/2 tsp. sea salt & 1/4 tsp. baking soda (got the recipe from my allergy doctor who said people with allergies should do this sick or not). I have a suction bulb that we bought with a package of Little Noses nasal spray for infants. I fill the suction bulb with the homemade saline solution and squirt it up one nostril. It runs out the other along with mucus that is up in the nasal cavity. I do this anywhere from 2-4 times on each nostril depending on how clogged my daughter is. You can tell when less mucus starts running out and more just liquid water is running through.
Now the big question is: how do you hold the baby? With 3 colds and experimenting different ways, my husband and I were most effective this last cold in our position, and I am sticking with this one. Side Note-It really does take two people to do this unfortunately. If you can at least do it when they wake up in the morning after a long night of congestion buildup, that is great. Second best is when they wake up and before the go to bed. Beyond that as much as needed if the congestion is major before going down for any nap or sleep and up waking from any nap or sleep.
Back to how to hold them. What we do is my husband holds my daughter on her belly kind of like Superman and puts one arm across her chest to hold her arms down (so she can't bat away the bulb). We lean her head over the sink. I then reach around her head with one arm to hold her head still (she will jerk her head if she can), and with the other arm I squirt the saline solution up the nostril. Since she is hanging over the sink, things run into the sink. I then stop to wipe her nose with a warm, wet washcloth to get off the excess mucus because it hangs there like glue! I repeat the process until I don't see anymore mucus flushing out with the water.
It's a lot of work, but it works SO, SO, SO well!
Love in Christ,
Lisa :)