Take a copper strand or two out of a lamp cord. Use these as a drill/prod to poke at and loosen the crud with your new tool. Twist a couple (or more) together if you want, for strength. Just don't make the bundle larger than the hole at the end of the jet. The metering orifice is located inside about where it wedges into the carb body. That hole is about .016 inch. Don't make it bigger if your tool is larger than .015. Clean/agitate from both ends, don't force it all the way through. Copper is softer than the jet material, but still abrasive. You can even mash the ends to make tiny spatulas, scoops, or chisels. When everything but the orifice is clear, use the nozzle from the spray cleaner, make a seal with your thumb and forefinger, and spray through the orifice to clear it.
Cheers,