I had a similar squeak/chirp coming from the front of my VX and finally narrowed it down to the hood latch. No amount of silicon or grease silenced it. I finally wrapped the catch with a few layers of self-vulcanizing tape. This prevents the latch from vibrating on the catch. I also adjusted my hood bumpers to allow my release to unlatch properly with the pull handle. Between the two I have no more squeaks.