do i have this correct?
the light in the middle is to attract them
the wires around the light are to zap them

how can i test the wires without frying myself?
a piece of paper does not burn, are the wires dead?

i don't see any mossies stuck to the wires like i used to
time for a new unit?

I saw some test it with some tiny strings of aluminum foil....similar to that which is put in christmas trees.

But try to make a piece of paper wet and hold it on the dry part far away and touch....just in idea not sure if it will work

Use something like a feather duster, it should "crack" quite easily, if not, may be time to change.

just turn it on, and ask your thai wife...