I own a Vicks vapouriser which I use with only water. You simply fill it up with water (and vicks/eucalyptus etc which is optional but I think unsuitable for little babies), plug it into the powerpoint and it gently lets off a little steam into the air. It creates moisture in the air - similar to the effect of a hot shower. I found it very useful in DD's first year when she caught many colds.
Another idea is raising the mattress/cot a little higher - difficult if you're cosleeping, but works well with a cot or bassinet. I used to sleep sort of sitting up with baby on my chest for as long as I could. Also b/feeding was done with baby in a more upright position.
I also used a product called "Karvol" which contains capsules filled with an oil mix (can't remember the blend but I think it was eucalyptus or tea tree oil and similar). You simply break the capsule and drop the oil onto some of the bedding or a hankerchief (not on baby), where the vapours can gently be inhaled. I used this around the age of 8 months, so you might need to check the packaging/pharmacist if it's suitable for newborns.
Hope some of this helps. My second DD is the same age (3 weeks this Wednesday!), so I'll need to review all of these tips for myself too.
Bookmarks