I totally disagree with it.
All comet surfaces have been "hot and dry"
All comet observations have shown silicates since we first started looking and taking measurements.
Actual comet samples have falsified that theory of comets being ices long ago,
http://stardust.jpl.nasa.gov/news/news113.html
"When we started pulling these particles out and examining them in electron microscopes and other instruments, we found even more surprises. First of all we found evidence that the standard astronomical predictions for the origin of dust in comets, or at least the ones in this comet, appear to be incorrect....
...We find spectacular silicate crystals in the comet. The presence of crystals in comets was suggested by astronomical observations but the Stardust mission results provide important new insight into their origin and history....
...The comet samples collected by Stardust contain abundant crystalline minerals and in most cases it is clear that they did not form by the predicted mild heating of interstellar dust. Many are too large, and have complex mineralogical and chemical compositions that could not have formed by this process. Instead of the mild heating that astronomers envisioned the comet samples were heated during their formation to severe temperatures, temperatures high enough to melt or vaporize them....
...Like in meteorites most of the components from the comet have isotopic compositions similar to Earth and are of solar system origin."
The old theories died out long ago and have been contradicted by all observations. You are simply refusing to accept the science and the observations to hold onto Fairie Dust - just as mainstream is - because they have no viable theories to replace the old ones. So that ice has become conveniently "hidden", just as 96% of modern cosmology is "hidden".
Not a single vent has ever been discovered, despite having a probe on the surface of one and one in orbit.
All jets have been observed to come from scarps or cliff faces.
In all comets that have disintegrated - in not one has any water been discovered in their remains - falsifying the "hidden" ices belief. Not a single extra drop of it. Flat out impossible if the core/nucleus is indeed composed of that "hidden" water ice.