DD is 13 months. Had been nicely doing two naps of about 1hr15 for the last few months but in recent weeks getting harder to settle, not sleeping for as long and sometimes just not settling at all. So I figured it's time to drop to one nap. Am trying lunch for an early lunch and then in bed for midday-ish. All sounds sensible but she apparently hasn't read the book that says she now needs to sleep for a couple of hours after lunch. Today it was 30 mins then with a bit of perseverance another 30 mins. Do I a) persever and she'll get the idea she now has a nice long nap after lunch or b) revert to two naps as she's not ready to drop one yet? She just seems permanently over-tired. (She usually does 11-11.5 hours overnight, occasionally will need resettling and has been teething recently so waking at night a bit more, but otherwise we do alright overnight.)
Any experts care to tell me what to do next?! TIA.