Hi D.,
Vaporizer at night with some drops of eucalyptus oil in it. Works great!
Also, there are some homeopathics you can use. Find a health food store, look for a product called 'Umcka'. It's a homeopathic cold medicine.
There is also a product called Sambuca which helps not only to boost the immune system, but you can double up the dosage during a cold or something.
Neither taste bad.
If you use VICKS, don't use homeopathics within an hour. The menthol will inactivate the homeopathics. Also, I would opt for the baby vicks. It has few chemicals in it and is basically eucalyptus and mint.
oh... pepermint tea is great as well. Helps open up the sinuses.
Saline drops and then use an aspirator to clear out the junk in the nose. Do that often to help keep her clear. I know they hate it, but it really does help. I try to make a game of it with my daughter. We've been through many stuffy noses because every time she cuts a tooth, she gets a runny nose!
I hope your little one feels better soon!