this is funny as it is my first post and i find this thread.
i have the same problem with my toro ice pinches--
i've found quick use of the new black short bottle GO (super soaker), even a few minutes, works just as well as a long soak onthese, and gets most everything off EXCEPT the pesky resin on the pinches. usually in my experience very hard to get to. if i work on it a long time and keep putting a bit of GO in it and rinsing, sticking my pinky in there, using pokers, i can get it mostly clean with this extra effort.
however, if you're like me and clean often, it is a drag. someone here said it's a problem with all pinches, but here i must disagree. and this is what drives me the most crazy about what it up with the toros (i love the toro slides, don't get me wrong, they turned me on to pinched slides!). i recently purchased a few royal ice pinch slides, and even though there is much less space in the pinches, they clean right out with the new GO--no extra work!
i think maybe it's a different texture of glass? also wonder if scratches in the toros hold resin somehow
anyway, just wanted to let you know you're not crazy, dude!