My 8wk old has always been a relatively bad napper but is generally happy to be put in his cot initially. He is then quietish but grizzly and wriggles for 20min or so but not so loud I feel I need to get him up. 20min in he either settles (rarely) or starts screaming and slowly cresendoes. I really want to get him self-settling prticularly as he has started waking like clockwork after 45min so I am keen / desperate for him to be able to get back to sleep. Anyone had anything similar? Should I try leaving him for longer?