I managed to pass without needing to do the trouble shooting measures. This level is Free the Ghost and doesn't have a lot of bubbles. I noticed that when I failed the level my score was low and never got a star. Maybe the score needed to get a star is too low.
Thanks @PrettyBubbles I appreciate that there are very difficult levels. But the problem with this level is I can't even work out the logic as how to pass it. I've already used lots of boosters to try and pass it. Uodate: passed the level