Seeds need to be kept damp, not wet. Just misting once in a while is fine depending on how hot it is and what lights you're using. Once they push through the soil still just misting will work till they get a couple inches. Cannabis requires oxygen to the roots. Thats why you can't keep them wet like you would with most other plants. Generally once they're up and healthy and a foot or so tall, just soak them once a week with water and nutes. Again depending on light source and heat.
Its a learned technique. Learn to the lift the pots when soaked to learn the weight and then lift them when they're dry. Sometimes you can wait till they are just starting wilt from lack of water to gauge when its time to water them.