Sorry I know baby sleep is so commonly posted on here but looking for some advice nearly 7m old DS has started fighting naps the last couple of weeks. I used to be able to rock him to sleep in my arms with a dummy and he would fall asleep fairly quickly. Now it's just not working, he is spitting dummy out thrashing around for ages. his wake windows are around 2-2.5 hours but usually he starts showing he is tired after just 90 mins or so, but surely he shouldn't need a nap after 90 mins? His first nap of the day today for example was for 1 hr 30 mins then an hour and a half later he is acting tired again and grumpy. His first nap is often long but the rest of his naps he is wide awake after 35 mins no matter what I do. His night sleep is unaffected and he is sleeping from 8 until 5am and then usually has a bottle and goes down for another hour approx . any advise appreciated