Hi! I'm not sure I'll be any help, but my son has been napping wonderfully till he was about 13/14 weeks than only napped for 45 mins a time. It didn't matter if we did sh/pat, paci, w2s, anything. I got frustrated and sometimes felt pretty hopeless. Now he's 5 months old, didn't change much in his routine (except adjusting to 4h routine obviously) and he can take longer naps. I think that sometimes it's purely developmental.