Everyone's environment is different as well. So, you have to pay attention. Everyday may require more or less watering. I highly recommend bottom watering for microgreens after they root and are uncovered. It only takes 30 seconds more or less depending on the root mass.
Harvesting. For most of us, we are just cutting enough for a serving or two. So, look at the photo below as I gently lift the kale and clip with sharp scissors just above the soil. Only the small microgreens can be harvested this way. Sunflowers and shoot peas will probably come out from the roots if you try this.
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GROWING MICROGREENS STEP BY STEP