This is completely bizarre. Its virtually impossible for that much to deposit that quickly without clogging everything. So that basically leaves degradation and reaction as root causes. I will be interested to see what EK says and also what your results are cleaning out components.
Something to keep in mind, I don't know this particular fluid but many of these pastels and show fluids are even advertised with a half life of x amount of time. If you read the fine print that is.