Amazing information, Thanks!
BTW, I've used an electronic cleaner spray to fix my issue.. now being over 2 months, it is working like a charm.
The thing what most of us do once we use this approach is; we do not target the sensor and spray loads of it on the hatch or the opening on the door lock..
You need to find the actual location of the sensor (YouTube) and then spray there. It should work for your passenger doors as well.