L used to STTN. Then he switched from bassinet to pnp and then to crib in his room and he basically has not STTN since - only with the odd exception. I figure part of it is due to his increased distraction during the day and so he needs a night feeding now. But when he wakes sometimes 2 - 3 times a night and we see him on the monitor worming around, he doesn't look comfortable. Also, since the weather has gotten warmer, it gets quite humid and warm in his room at night sometimes.

Based on these issues we have decided to get him a better quality mattress and an air conditioner for his room. We also got blackout curtains and I think they have helped with naps - but I think the curtains also lock in the humidity, despite leaving the window open and turning on a fan.

Our new mattress is not here yet, nor has the air conditioner been installed so I can't say if these things work yet, but i have testimony from other friends that they made a significant difference so we are giving it a shot and have high hopes.

I am just wondering if anyone has tried anything else to make the room more "sleep-friendly"/comfortable for their baby?

ETA: I have high hopes for the mattress in particular because when we first transitioned him to the crib his morning naps fluctuated from 30 to 120 minutes, with an average of 45 minutes. When he was in the bassinet, he was sleeping 1.5-2 every morning for his nap. Well, since we have a queen size bed in his room as well, i've just started putting him for naps in the bed (with pillows to block the edges and i watch him on the video monitor the entire time)....and he has gone back to 2 hour naps! He doesn't even roll or twitch during these naps! But when he is in the crib at night, he rolls all over and looks like he is trying to get comfortable! If only i could let him sleep there all night....but of course I won't dare let him sleep on the bed if i can't watch him....