damn, and I thought my peppers were in trouble b/c they're not growing fast enough....
yeah, I started my seeds in small cubes similar to yours, and depending on what you used for soil, I noticed mine (with heating pad) dried up completely pretty fast, once I took off the plastic wrap I have to water everyday to keep that small amount of soil moist, none of mine are wilting, but I notice you at least have a second pair of leaves.........I have strong healthy seedlings that will not get to true leaves fast enough...I'm building a shoe box lined with reflective foil and putting light right on top....but with cubes that small still might water everyday if the top of the soil looks completely dry
when I first started i was worried about when and how much to water.....but it's the easiest thing there is, as soon as the soil starts to look dry in cubes that small...just water them, when you transplant to bigger pots wait till the top soil is pretty dry, and water until some flushes out the bottom, then let it sit until the top of the soil is really dry again