Cleaned up an old cast iron that needed new seasoning. Followed directions I found on-line. Applied a thin layer of oil (I used canola) with paper towel, put skillet in preheated oven at 350 for one hour, upside down on the rack.

Removed it, let it cool down. Now there is many sticky areas from the oil. Why did this happen? What did I do wrong and how can this be fixed?