mayhems pastel

Hi, I have had Mayhem pastel white in my loop for a year and have decided to swap it out for just distilled water. The trouble is after draining, flushing till it runs clear and then using Mayhem blitz part 2 running through the system for 24 hours, my hard tubes and reservoir still have a dull...

I've got an EK reservoir, the tube is made of proper glass not plastic, and I've just drained my system that had Mayhems Nano Pastel White fluid but even after cleaning it there is a white cloudy substance inside the glass. Is there a way to remove this so it's back to its lovely clear glass...

I will be assembling my first hardline loop with a pastel fluid, just waiting for the last waterblock. I have ordered a Blitz pro kit to clean to new EK rads out but with it been a new system should i also do the second part with the loop assembled with all the fitting/blocks been new or would...