Just installed dual halo projector lights and they started to fog so I took them back out. I was wondering if the 3 removable caps are vents or do I have to get some flowable silicone? Thnx to anyone with some insight.

Ive noticed my windows have started to fog up all the time. Is there a chance this is due to the cold weather? If so, thats good because it will be warmer soon. But it really makes it hard to see my side mirrors and windshield! Or is this a common problem that I can fix?