We haven't had this issue yet either. But is the RnP washable? I just pulled apart the swing to wash it after LO threw up in it. I assume Fisher Price would have made it washable, but I haven't investigated.
All of my rock and plays allow you to take the cover off to wash it. If blowouts are consistently a problem though then I may size up the diaper just to be safe.
DD has only had two. Both of which only leaked onto the cover a small amount. Thankfully it's happened during the day so it's not a PITA to throw it in the wash. Just wondering if anyone is using anything to avoid having to throw it in the wash.
Re: rock n play blowouts
Baby G born 6/6/14, 37 weeks 1 day due to preeclampsia. 5lb12oz 19"
#2 due Christmas 2016.
Of course, our only blow outs have happened in the car seat... Ugh!