cleaning intake manifold / carbon goo on injectors

I removed my lower intake manifold with fuel rails and injectors still attached, and I cleaned the ports with throttle body cleaner. I didn't think about the injector nozzles, which got covered with carbon goo.

What do you suggest I do? With the injectors still installed I wiped and blasted the nozzles aggressively with throttle body cleaner, which I figure might be ok since it's made for dislodging carbon. The 4 holes in each nozzle are clear, but I don't want to risk any goo stuck in them, and there's still some stuck around the edges of each nozzle. Should I remove them all and soak or swish the nozzles in a few ounces of fuel injector cleaner (the kind normally added to gas) or something? Pic below.

Also, with the manifold off I'm going to carefully clean the cylinder head intake ports, but it looks inevitable I'm going to knock a little debris in the ports. Are the ports sealed up such that I can blast air in them to blow anything back out?