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I haven't got that far yet, you're doing a lot better than me! I did find this video online though of a player passing the level, I hope it can helps you.
https://www.youtube.com/watch?v=tS8pSwwnCfM
Also when I am really struggling with a level I give it a break for a few days and then when I come back my brain is refreshed and I always pass the level in one or two tries.
I hope this helps, let us know how you get on.