A new cast iron skillet is gray, but a well
Keep your skillet in great shape by rinsing with water while it's still warm and scraping out any food. Avoid using soap and definitely don't put it in the dishwasher. Make sure that it's completely dry before you put it away. My mother-in-law taught me the little trick of putting it on a warm burner for a few minutes after washing it to make sure all the moisture is gone. Just don't forget about it! :)
Now you can enjoy cooking your light and fluffy homemade biscuits and fried squash in a future heirloom that you can be proud of.