I have the same problem of mucus in my throat and not being able to clear it. I have used everything available but nothing seems to work for me. It is worse in the evening when my throat is locked up with drainage. I use a vaporizer before going to bed and it helps loosen it up so I can go to sleep. Sometimes I have to use it twice. I feel like I am chocking and will wear out my throat with all of the clearing. I have been to an ENT Dr. without success and am going to another for a second opinion. If anyone has a recommendation for a highly rated ENT Dr. I would appreciate it! I also use Neti Pot, and humidifier at night without much success.
Good luck!