Truly have to agree with @artist01 , really is to get into a steamy shower a few times a day or boil some water and use like a towel or som over your head and open those air ways open and just hock it up. I was having really bad episodes of gagging and chocking. I have also used oil or herbs in the water like eucalyptus mint even lemongrass anything that can open your airway lemongrass has a way of opening your airways and helping you relax at the same time but once you get those airways open you got to get that stuff out. I have yet to find anything to aid in the process. I am going on now 3 years this coming week for the 1st. Contract of Covid -19. I am just now starting tombe able to move around, but I tucker out fast. And this cough and sludge in my sinus cavity sinus cavity and check does not do any justice. I also agree with Artist that Elderberry will aid in giving your immune system a good boast