If it doesn’t work the first time, release the home button and try again. Try moving closer or further away from the Firestick.
AOC: E-link Hitachi: HDMI-CEC LG: SimpLink Mitsubishi: Net Command for HDMI Onkyo:Remote Interactive over HDMI (RIHD) Panasonic: HDAVI Control, EZ-Sync, or VIERA Link Philips: Easy Link Pioneer: Kuro Link Runco International: RuncoLink Samsung: Anynet+ Sharp: Aquos Link Sony: BRAVIA Sync, Control for HDMI Toshiba: CE-Link or Regza Link Vizio: CEC