Generator question - let carb run dry or keep it wet?

Kayteg1 wrote:
Teaspoon of fuel left will make less varnishes that several oz of fuel left with the bowl full.
And again, have been doing that for over 20 years and never had to take the bowl out yet.

It is not "the teaspoon" that can cause the problem. If the owner lets it run low on gasoline every time he shuts if down for a day, week, or month, multiple teaspoon are evaporated and the resulting deposits are left behind. End of the season, one teaspoon, not much residue.