I've used fuzzibunz one size succesfully for my ds from ~2mo-2 yr, and now am using them with dd whose 7mo, but they leak all the time, even after less than an hour of wear. Often the pad is saturated but not all the time, but she's quite small still (16lb) so I can't see how using double inserts would fit. Sometimes it looks like they might be leaking through the seams. I've replaced all the elastic and I think the fit is good. I'm wondering if they're just worn out. We did live in the tropics with ds so they did have 2 years of line drying in hot tropical sun - would that have degraded the PUL lining? I dont' know how much time to spend trying different settings, different inserts, or whether to just accept that after 2 years of good use they're finished. Any suggestions?