Google Home Speaker Microphone

After many months of enjoyable use of my Google Home Speaker it suddenly stopped responding.
I had changed modem and router and so I had a new WiFi setup and I thought that was the culprit, but resetting the Google Home Speaker by pressing and holding the Mic button for a long time did not fix the problem.
I used Netgear Genie to make certain my Speaker was recognized on my Network.

I then spent a long time on the Internet, searching Google's website for answers.
Finally I called Google and a Tech there talked me through a couple procedures.
But none of them worked either.

I was getting music I wanted to play on the Speaker to play on my cell phone, so I knew the connection with Google Music was good.

I could not find anything on the Web about how to take the speaker apart, to see if there was a bad microphone connection or something visible I could repair.

I had used the Google Home Speaker for a long time, and just as a last effort I put some 91 percent rubbing alcohol on a Q-tip and gently wiped the 2 microphone openings (Yellow arrows).
A significant amount of lint was present on the Q-tip.

I swiped both openings one more time with alcohol using the Q-tip.

The speaker starting working again, perfectly.

I hope this helps someone as frustrated as I was.