Well I changed a few things.
First, you hatch where you grow. I put the 'bator on lockdown at day 18 and upped the humidity to 50% even though I had different hatch dates in there. I incubate and hatch in egg cartons so I continued "tipping the 'bator" until day 21 (or first pip which ever happens first). I have these plastic pipettes that I put water in the incubator with. I try not to open the incubator at all after day 18, as a matter of fact, not after day 14 really. I candle on day 14 to take out the clears and blood rings. It's lockdown after that. (Unless you have a stinker. You don't want that thing to blow!)
Make sure you open your ventilation holes on day 18.
Keep your temp steady, your humidity at least 50%, make sure your ventilation is good.
Tipping the incubator until day 20 seemed to work last time for me, so I might just do it this time too.