One of the inherent traits of misting systems, is that they require tweaking. As leaves grow, chams move branches and vines, and as nozzles clog, water goes where you don't want it to.
I have 6 cages, each serviced by the Mistking misting system. As I faced what you are facing, rouge water hitting and "spittting" through the screen, I moved my plants to block the water better, and bought the white nozzles mentioned.
Initially, the spitting through the screens reduced enough that a ShamWow (absorbent shammy) solved the problem. Then spitting started expanding to new and once dry places.
I also noticed that the 3 sets of 2 cages each have a 5 gallon bucket that services the 2 cage set for water collection, and although when first set up the collection buckets all filled at the same rate, I have had each bucket take it's turn at being filled before the other 2, at a rate of twice as fast. After replacing all six nozzles, it would all even out until...
After lots of nozzles, and monitoring the misting cycles, I had an epiphany; misting systems must be checked regularly.
In my case, my mineral content was not the only problem in the plugged nozzles. The issue for me was i had the lid off my 20 gallon reservoir to dissapate the chlorine, and my cat would dip her paw into it for a paw-lickin' drink. My nozzles catch screens were being clogged with cat hair....
I tried feeding the cat to the Mellers, but my Mellers is not quite big enough YET...
I covered the reservoir, but still left room for the dissipation, and 80% of my clogging is done. I did one thing that has reduced my time of taking the nozzles out to clean them in CLR, and cleaning the 1/8 inch screens. I installed a variable turn off valve between each nozzle and the mainline so that when I want to decrease/increase flow to any one cage, I can do it easily.
This way my nozzle cleaning is grouped, and I also can hit my Mellers, Quad and Montium with more water than my other species.
Hope this helps
Nick
) this is the one i have 
