I use Micro Sol, too. I have also had the clouding issue with Future-Future laid down as a gloss coat, decal applied, then the setting solution. But I have been able to apply another thin coat of Future over the clouded area, and that cleared it up for me. Sometimes, the clouding cleared up on its own, as the acrylic cured again.
I don't remember where I read this, but I recall that the active ingredient in Micro-Sol is acetic acid, and that the difference between Micro-Set and Micro-Sol is in the concentration of acetic acid in the solution, that Micro-Sol has a higher concentration. I did not read this at MicroScale's own website, because I looked now and haven't found that info. Maybe Momo will find it.
I also use Solvaset, whose active ingredients are methoxy-2-propanol and methoxy-1-propanol (it's right on the label). It's definitely hot, and I use it on thicker decals, and decals over compound contours. I'll also use the cutting and piercing technique, on particularly difficult decals.
Again, with Solvaset, sometimes the gloss layer of Future will cloud, but it will clear up again, as the setting solution dries and the acrylic cures again. A touchup with a little more Future also helps here, too.