DS is 17mo and has never been a "good sleeper". He has gone through phases of sleeping through 8pm-5am, but these have lasted weeks at the most and didn't start until he was about 13mo.
He has one regular nap in the day usually 10.30-12 ish, eats well and still has milk so I don't think it can be hunger. We have a good bedtime routine and he goes to sleep between 7-8pm in his own room and gets put down awake. He has never slept in a cot so has a mattress on the floor as per HV advice with baby gate at the door. This way, if he is really unsettled there is the option of one of us co- sleeping with him.
Without fail he has been waking up at 12-2 and been awake for a good hour or two every night. Rarely, he seems to just be babbling so in those cases we don't go in, more often than not he cries out and gets more and more distressed if we don't go in. However, once in there, he tries to play or is just unsettled still. It's almost like he needs to tire himself out to go back to sleep?
What would you try? I've never wanted to do CIO but would it work?