Need help:

My Burb has started to shut itself off this morning while driving. Fires right back up though after I pull over.

OK, I noticed lately that the Voltmeter is going down and once I did not get anything in the morning while trying to start it. Acted kind of "dead" with no movement or starter cranking sound. After trying to start a couple more times it finally fired. About a year ago, I had a similar problem with the Voltmeter going down and I barely made it home once. After taking the battery terminals off , they were very much full of the usual "goop". After cleaning the terminals, all was good again up until now.

You guys think this could be the same problem? Should I start with trying to clean the battery terminals first? The batteries are not too old, I think they are holding the proper charge.

Is this a possible PMD/FSD problem?

Any help is appreciated. Thanks in advance.