Thanks guys. Unfortunately, I'm sure the head is in trouble. They've been dying for a while, and I recently had 2 of them changed and now the Yellow is crapping out. After a zillion cleans, it's still streaking like crazy on the test prints. I've tried cleaning it on the ultrasonic cleaner, and although a lot of gunk came off, it didn't help a whole lot.
Also, it's "dripping" Not sure if that's the correct term, but basically ink would accumulate during the print cycle, and eventually drop on the media. I've cleaned all around the head, and checked for any lint or dirt that might do that but nada. Fortunately, the last few jobs were on vinyl with lots of white background so I was able to clean the ink drops off after printing but now I have a wrap job that is full coverage.
So I'm gonna have to spend another chunk to get a new head.