I came upon this group by accident but noticed some of the carers having problems with phelgm. I had tried everything including some of the advise given here. The salt pies I have bought for my mum and my self. From the first day her chest is cleaner, her breathing has eased, she gets the phlegm up much easier and is not taking coughing fits. So for anyone with chest problems cold, asthma etc. This is the most reasonably priced item from £9.99 ---£15.. I bought my ones on Amazon.
IT WORKS