Each of these won’t take more than a few minutes at most, so when Google Home doesn’t respond:
Press the microphone mute button to see if Google Home was muted accidentally.
Unplug Google Home before waiting at least a minute to plug it back in.
Gently blow on both black dots on the top of Google Home, and then wipe the top with a soft and dry
Perform a factory reset by pressing and holding the microphone mute button for 15 seconds until you hear the confirmation from Google Assistant. A factory reset will clear all personal data from Google Home.