If nothing's hatching and/or the fishing is tough, start thinking outside the box... I like the dry/dropper idea. Maybe put on a big foam ant/beetle as your dry, and then drop a small mayfly nymph or sow bug under that. Double the chance to catch fish with both your nymph and your "indicator". You could even go with the hopper/copper/dropper idea, where you incorporate another nymph off the back of your first one... that can get dicey though, more flies = more tangles.