Answer:
During the installation, you need to remove the air bubbles step by step when applying the film. If you see any air bubbles happen, remove them, then move to the next part.
Need to carefully peel off the PDLC film and remove the bubbles, need to be very patient and do it slowly. And need to pay attention not to blow any dust inside, otherwise need to remove the dust first, then can remove the bubbles.
