Condensation in all lenses plus green screen!

Most probably it is because of water. This is what you should do

1. If a liquid other than water splashes on your iPhone, rinse the affected area with tap water.

2. Wipe your iPhone off with a soft, lint-free cloth—for example, a lens cloth.

Make sure that your iPhone is dry before opening the SIM tray.

To dry your iPhone, tap it gently against your hand with the Lightning connector facing down to remove excess liquid. Leave your iPhone in a dry area with some airflow. Placing your iPhone in front of a fan blowing cool air directly into the Lightning connector might help the drying process.

Don't dry your iPhone using an external heat source or insert a foreign object, such as a cotton swab or a paper towel, into the Lightning connector.

Your iPhone can warn you if there's liquid in the Lightning port when you connect a Lightning cable or an accessory to your iPhone XS, iPhone XS Max, iPhone XR, or later. Learn what to do if you see a liquid-detection alert on your iPhone.

I'm going to contradict what Ahmad said in his point 1 regarding non-water liquids: if your iPhone got splashed with any, do not just rinse your iPhone. That's almost guaranteed to damage your phone if it's not damaged already. Just wipe it with a slightly damp - and I do mean damp, not wet - lint-free cloth. Or you can use a 70 percent isopropyl alcohol wipe, 75 percent ethyl alcohol wipe, or Clorox Disinfecting Wipes. Gently wipe the exterior surfaces of your iPhone. Don't use products containing bleach or hydrogen peroxide. Avoid getting moisture in any openings, and don't submerge your iPhone in any cleaning agents.

Otherwise, his advice is excellent.

Regards.