Yep. Hubs and I put a few of our worn shirts under our LO's cribs and their number of night wakings dropped dramatically. I'm getting 8 hours of sleep!
Twins are 3 months now and still had a few 'comfort' wakeups most nights in addition to feedings, so we were still getting up every hour or two all night, and totally exhausted.
Our dirty laundry has completely eliminated the comfort wakeups for the last week - they only wake once or twice to eat! I guess being able to smell DH and I helps them settle themselves back to sleep quickly when they wake at night.
Just thought I'd share in case this could help someone else. Or maybe this is already common knowledge that I just finally figured out