Orange juice also creates mucous... it is not recommended if a person is sick or is congested.
What has your Pediatrician said about it?
Could she possible have a sinus infection or sinus problem? THIS also creates mucous, in the throat, because it drips down... or is the mucous coming from her chest???
The thing is, you have to know where the origin of the mucous is coming from... this will indicate the source of it, and the source of the problem.
When my kids have a cold/mucous.... I either let their body fight it off... but if is goes on and on and on, I take them back to the Doctor for re-evaluation. THEN, either give them lots of liquids, in conjunction with kids Claritin (which will dry up the mucous) and saline nose spray, and use the Neti Pot to rinse the nose. My Husband and daughter are prone to sinus problems... and this helps them greatly.
And I give my kids liquid vitamins by "Animal Parade."
Keep in mind, that although you do juicing and organic foods... something in it may affect her or she may be allergic, hence the continual mucous problems. For some people, even wheat/barley green drinks are allergenic for example.. because of the chlorophyl in it. My Mom is like that. AND keep in mind that although you are doing juicing/organic foods & it is healthy... it is NOT helping. Thus, it is not effective for whatever ails your child.
Next, my Doctor says that if something like this is just lingering for this long of a time... then perhaps it is allergies or a secondary infection.... OR, in the case of my daughter, she had a Sinus Infection, after all.
BUT THE bottom-line is... you have to find out WHY she is STILL having lots of mucous... and why? Otherwise, you will just be addressing the mucous, but not the reason.
Ask your Pediatrician... otherwise, it will just be speculation and guess work. And, what works for one child may not work for another, because they have different reason for their mucous/illness etc. AND their symptoms are not all alike.
For some kids, it is even asthma.
All the best,