There are 2 kittens that are 5 months old. They have been getting under the hood of my car. Today I was going to leave and I rapped on the hood which usually gets them out. I left for my oil change appt which is about 20 miles away. When the tech opened the hood, there was one of my kittens. Kitty was scared to death. I put him inside of my car and the tech finished the oil change. I drove home and let the kitten out back in the garage where his sister and momma were. He was so happy to be back. I'm glad he is safe and not hurt. What could I put under the hood to deter them from climbing up under there again?