I managed to clog two nozzles using T-glase today because my Z was set too low and it managed to scrape up enough particulate matter off the glass bed to clog the nozzles twice. I had one spare .40 nozzle that was previously clogged with ABS and cleaning it out was a simple matter of soaking it in acetone until the ABS turned into pretty much a liquid and then mashing a thin rod in the back end to push out anything left inside. Worked like a champ, but I found that T-Glase doesn't work the same and cannot be dissolved using normal household liquids. Had to find another way to knock out the goop in it...
Decided to throw mass quantities of heat at it using mapp gas torch. Turned the torch on low and put the mildest part of the flame on the tip and heated the nozzle past the point where it stunk a bit and heated it until I saw small red flecks forming on the outside. Then I kept it at this heat for a while before turning the torch off and letting it cool. I rested the nozzles top side up in a vise without tightening it down on the threads. Worked like a champ. Used a sewing pin to knock a little of the residue out of the nozzles and they were good as new (just not as shiny as they once were...).

I'm using one of these nozzles right now as a matter of fact. Printing a Julia Bloom Vase for my sister-in-law's birthday present. Printing an oversized stein for my bro too.
Thought I'd share with the rest of you in case anyone else ran into the same problem.