After all function tested, I put my car outside under sunshine for 12 hours to test the 66BR. That's no problem.

Finally, my results are:
A: Cannot put back the cover onto the right and fit position because I forgot to mark down the original position of the sensor, then I need to use a tape to fix.
B: Auto light function have seen some delay btu still function, maybe I applied too much 66BR. Try to apply thinny.
C: Rain sensor is function but I need to activate once time on raining to start the function. Then it can stop when no rain and it can start when rain again. The intermediate step can function now, also it can stop when the car stop to move.