losing hearing in the ear from a cold is due to mucoid effusion which is temporary but it has one wondering will you get hearing back in that middle ear. As you age the tunnel in the ear is longer and when even a bath or shower helps gets water in your ear it takes awhile to get out. Never had this problem before but age brings changes and if that is all I have to worry about , I guess I am alright. There is not much you can do about it . So ride and be happy it is nothing more.