Sometimes when retraining to lay in the right spot... It may take a couple whole of days of confinement. Otherwise I would wait until 3 or 4 pm. I always wait until at least 4 to take out snack for the flock so those in lay boxes don't get snubbed. Other wise if I know who already aid I might catch them and put them out. How many are you still waiting on?
Leaving fake eggs in the nest has made a HUGE difference for my gals that would go out of their way to lay somewhere different when they thought the nest was being raided daily. And boy does it get old searching blackberry bushes for hidden nests. One was even 20 feet up a redwood stump!
If I have a girl who absolutely won't get with the program... she get's rehomed to someone who doesn't mind searching for nest or someone who confines their birds.... It's almost always my Easter Eggers! 
I don't know why you would try to feel for an egg on a hen that isn't egg bound. My guess is no you can't feel it. 

 Also, not all girls lay everyday. So today might be the day off for some... breed can give you a clue as what to expect.
To me even though confinement might be "bad" in our thoughts.. Ultimately it is for their own health and protection sometimes and while I (or they) may not like it... I sure don't feel guilty.
When I can't find a nest... I watch behavior. I'm fortunate enough to have my days available, though I know it won't be an option for many. Sometimes the cackling can give you a clue to when they are getting ready to go to their spot. Sometimes the girls that are lined up waiting for that lovely spot will cackle to hurry along the current layer occupying the nest. "Raiding" these nests and destroying them *should* instinctively encourage the girls to lay in a "safe" place.
Hope this helps some. Good luck!