Update on getting ear molds for my Bose hearing aids at Costco: I was led astray when I made my appointment. When I went in, I was told that Costco has no contract with Bose and for that reason cannot make ear molds for them. He doubted that ear molds would help with this condition anyway. The audiologist did talk to me about a procedure that some, not all ear surgeons will do to help with conductive hearing loss due to blocked eustachian tubes called balloon dilation or balloon sinuoplasty. I want to learn more about it. Anyone had this procedure?(from youtube):