Such an important question to ask. I have booked myself in for an hour of halotherapy for this Thursday. Basically Salt Therapy and seemingly very effective for people for a range of chronic conditions, such as asthma. Basically means sitting in a room with therapeutic salts, breathing it in for an hour. I found covid has had an impact on my breathing and subsequently my blocking. I am hopeful the halotherapy proves helpful and will report back here. Had anybody else tried this before?