I’m not sure if carb cleaner is a culprit. Brake cleaner is a definite no-no. I’ve always removed the needle valve before spraying the inside of a carb. If you’re stripping the carb completely down before putting it in the ultrasonic tank, you should be good.
Have you gone back out and do you have the same problem?
LAD Specialties customer / tony kart / rotax / kt100