Soaped at room temp, and just left it on the counter when done. No insulation, nothing. It's not that big of a deal for what I'm doing with it. Just thought others should know. It's a really strong scent too....soaped at 0.5 oz PPO and it's STRONG. It kinda "puffed" the soap and it hasn't gone back down. It's a bit soft, but that could be because of the TD too....though I only used a LITTLE bit....(I think I'm starting to hate TD....there has to be another way to get white....). I made another batch with a different FO at the same time the same way and it's totally fine, so it's deff the Peppermint FO that caused it.