As I said the water has to be spot on, I can’t remember the temp but this is crucial apparently.
It’s no good trying it in a bath of cold water 
I’m glad you believe YouTube make you an expert!
Whatever, you are always happy to drag someone down because you are the expert at everything.
I didn’t say that YouTube makes me an expert, I said it was in the video above which is on YouTube.
Sorry to pass on what I’ve been told.