I see when my 5 month old shows tired signs but because she takes so long to rock to sleep, she misses this tired window and becomes overtired, resulting in her becoming restless and me rocking her for an hour or more (my biceps are like steel now!).
If I try to start the sleepy routine before the tired signs appear it seems worse.
I've been pacing the nursery for 90 minutes already and she still isn't asleep