Heat Defender heat protector spray

Well i use this and hopes it protects but really how do u know? it doesnt hurt my hair and it says it protects but again i cant really find out i've had my bottle for a while so it'll still last me

Well I used a whole bottle of this and I'm not really sure it did anything great for my hair. My hair actually feels softer without using it. The spray does smell good however. Hard to find in...