Answer:
The higher I climb, the hotter I engage. I cannot escape from my crystal cage.
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat. And your heart grow cold. I visit the weak, but seldom the bold.
The itsy bitsy teeny weeny yellow polka dot variety is quite popular.
It doesn't live within a house, nor does it live without. Most will use it when they come in, and again when they go out.
What has a head, a tail, is brown, and has no legs?
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.