My partner has constantly got mucus on his chest and finds it hard to breath sometimes as he can't get it up and off his chest I am constantly massaging his front and back to try help! It's very worrying please can somebody help advise what the best remedy is this stuff comes up with lots of black stuff inside sometimes like jelly! Thick sticky slime type stuff! He's been to the doctors many of times but they palm him off with tablets which don't work! Iv Google it and it's sounding like one of them vibrating vests may be a good idea any other ideas please he's been like this most of his life but it's getting worse now only 31 please help?