Hi all, I am planning to buy some preseasoned lodge cast iron skillets and have been researching a lot about cast iron use and care. I have a what I believe to be a cast iron wok already so I am comfortable with cast iron. I understand that you're not suppose to put cold water on a hot cast iron skillet or it'll crack (although the water didn't bother my wok), but what about heating up a skillet with high heat on a gas stove? Is that ok or should I start with low heat/medium heat first and then crank it up to high heat? Any help would be appreciated.