Alright, I got a cast iron skillet from my mom a while ago, and I've been trying to get it seasoned and care for it properly. I have been using salt to scrub it, no soap. Rinse, dry, oil, paper towl under anything that goes on it, etc. All I've made so far was bacon, cornbread a few times, and an upside down cake. I just got a stiff-bristled brush to clean it, and the first time i used it it seemed to take off the seasoning that I'd been putting on it. Problem number 1.
I just cooked some potatoes in the skillet, with onion and garlic and olive oil. I let the pan heat up first (on medium), then the oil (a good amount) and let it heat up. Then the garlic, onions, and potatoes. The skillet basically developed a nice film on the bottom of burnt everything. I finished cooking, but I'm concerned about whether or not this is a question of poor seasoning or what. My skillet also seemed to heat unevenly, as I could see a clear outline of where the flame was hitting the pan where the food was burning first.
So basically, did I do something wrong? I'm also afraid to use the brush again for fear of removing any seasoning left on the skillet after this. Any answers you've got are appreciated. Help me, all-knowing Chowhound community!