Say Rick,
What I did last weekend was install a fuel dot inline with my carb on the cowl. This allows access to both high and low needles via the fuel dot hole, and the dot covers the hole cleanly when done.

I too live in a rather high humidity area like you, so I figured I needed to do a minor tweek a time or two every season.
DA makes a very nice low profile fuel dot with the letters DA machined into the dot...very cool.
I know gassers don't usually require much adjustment, but I didn't want to have to remove the cowl every time I needed to.

Just a thought, good luck.