bc,
I have had alot of success pulling stock injectors out and cleaning them.
I use diluted alcohol in an ultrasonic cleaner. I leave them in for 5-10 minutes.
Take them out and rinse them in a separate bottle of alcohol. This has worked fine for me. Wait a bit and I'm sure your thread will find other opinions.
Be careful with alcohol and ultrasonic cleaners proper ventilation is a must, the vapors can be explosive and very dangerous. The correct usage requires a special ultrasonic tank. I have setup mine for venting and shutdown when temperature bigins to creep. If the cleaning run is short temperature is not an issue.
root