Youtube Video – Changing the Wax Screen on a GNResound Open Fit BTE Alera Hearing Aid Youtube Video – Changing the Wax Screen on a GNResound Open Fit BTE Alera Hearing Aid August 26, 2011 Emily Changing the Wax Screen on a GNResound Open Fit BTE Alera Hearing Aid – Harmony Hearing Emily August 26, 2011 Categories:GN ReSound, Harmony Hearing, Hearing Aids & Technology