Rinse and drain 2 - 3 times per day as you did on day 2.
Each day check the sprout length. If the sprouts need more sprouting time (less than an inch, no real leaves showing), put them back in your cool, dark storage location after rinsing and draining, again tilted upside down for airflow or lay horizontally. They should be ready for a little light by day 4, but depending on the seed, that could happen a little sooner.
When the sprouts are about 1 inch or more in length and show small leaves, it's time to give them a little light. Place in indirect light, never on a hot window sill.
Whether the sprouts are getting some light or were placed back in storage, rinse with fresh water 2–3 times per day. And again, always drain thoroughly.