Ds2 is a pretty good sleeper at night but rubbish at naps - wants to be held, wakes five minutes after being put down etc. Am wondering if it's the light that's the problem. I don't want to go to the hassle of fitting blackout Curtains / blinds in case it's not really the light making a difference. Has anyone tried Snoozeshade (so I put him to nap in his buggy indoors) or that window film so I could block the light in his bedroom? Thanks!