I have an 89 Cougar...
Doing the excact same thing...
I was only assuming on my End that I needed:
A can of that Super Hood Latch Closer Helper...
Or in other works.. soak it with WD-40
Actually, My car is parked in the garage for the winter.. and I don't like wd40 all to well... so I was going to get some other kind of lube for it..
Again, I only assumed this is what mine is going to need...
I think it happened to me one other time.. and wd40'd it... Hence why I don't like the stuff.. I have to lube it again..