I have found that Chemtronic Chem-WiK Rosin SD works the best when I use it, which is not often anymore. I use the size .030. It works great every time unlike Radio Shack brand which doesn't always cut it. You might try applying some flux to your braid if you're using that.
Sometimes a hole will be stubborn to clean out, and it takes several tries to do the job right. Try adding some more flux if you have it, and starting over. I have had pretty good success sometimes with just filling the hole completely up with solder and then stick the braid on again. If you can, and your tip is small enough you can try to push the braid into the hole some and twist a bit. You gotta be careful because after so much the trace material will start to come loose from the board.
If nothing seems to work then I would be glad to clear it out for you, if you just wanted to stick it in the mail to me. I can turn it around to you same day, no charge of course. I use a Pace MBT-250 with SX-90 Sodr-X-tractor. I know it kinda defeats the diy spirit a little, and a new board isn't all that much, but you would then have to repopulate the whole thing again.
I wanted to say the other day when I read your previous posts, that sometimes when dealing with a ground connection I find it necessary to crank up the heat a little, because it seems the heat gets wicked away so quickly and easily.
