first you need to be sure that those FOs are in fact skin and cp safe. Reputable companies that sell soap safe FOs will usually list if it is CP safe or not. Once and a while you will still get a FO that says its safe for CP and will give a little reaction, and for those instances, YES keep stiring. Are you doing any kind of water discount? If so then dont, more water usually allows for slower tracing so you have more time to blend fully before it turns to pudding.