Bactrus, point us to the poll if you have set it up
For me, I use the water tray method and Cocopeat.
How do I know if it is too wet? When molds start to grow, then it's too wet
How do I know if it is too dry? If the cocopeat on top is light brown and you can blow on them and they move!
Water tray, probably best if you let the water tray dry out for one day before replenishing. Make sure you have at least 3 inches height of cocopeat medium or else it might get too soggy/wet. Water tray is 1/4 inches high or less.
I also often put a humidity dome on my seeds, they seem to like it when I do, but maybe also because it lessens the amount of sunlight a bit.
TTFN
Arvin