you need to get the lubricant worked into the latch mechanism - just spraying is sometimes not enough.
to work it in, you will need a helper and a screwdriver to push the latch closed - a #2 Phillips works well - and a GOOD penetrating lubricant. My personal preference is PB Blaster.
get the hood open and prop it up
Spray the latch mechanism thoroughly, then use the screwdriver to to push the latch closed (it will take a little effort), have your helper pull the release as you pull upward with the screwdriver - do this repeatedly, respraying every 2 or 3 times. You will know when it has loosened up because you wont need to 'pull up' anymore to open the latch, it will pop open on it's own. Spray it again to rinse out any loosened rust/dirt/debris. Once you get it loosened up, hit it with some good white lithium spray and it should last a long time.
Edited by heartless, 20 June 2017 - 10:09 PM.