And THAT is why I require supervised color correction in my contract.
it's a fair question. I agree that CGI is not cinematography. Neither is computer animation. I think something like The Nightmare Before Christmas, which was shot stop-motion and lit and used a camera is a fair contender, but not Finding Nemo, and a shot of a boat in a water tank against a green screen is a stretch, for sure.
But it's not cinematography. It's a different art form so I am of the opinion it should not be included in cinematography categories. Animation and shots that are primarily CGI aren't the same. Not discounting them, because I love animation just as much as the next person, but creating something in a computer with no restraints on lighting or camera movement is not the same thing as working on location with equipment.
Never EVER put anything directly on a lens. Get an optical flat if you have a matte box or a threaded UV filter if you don't, and apply whatever you need to use, like vaseline, on the filter only. Much easier to clean and you don't run the risk of ruining the coatings or goop oozing into the optics.
If fogging is your only concern, I agree the hair dryer is probably your best option with no budget, but you will need to safeguard the lens and camera from the moisture somehow. But you should check the lens specs and use as little as possible. Plastic and glue can melt, metal can burn your hands etc. I'd definitely recommend testing before you're on set to make sure it will do the trick. Heating cables are used to keep eye pieces from fogging, so the theory is sound, but I haven't tried it myself. A heating pad might also be an option- has a consistent temperature and can be regulated better than a hair dryer.
There are some wipes that can be purchased for preventing viewfinder fog, but I have no idea if they are safe for lenses (I doubt it). You could possibly use them on a filter safely, which would need to be threaded to your lens to block the moisture from the optics.
If you end up using a fog machine instead of shower steam then you shouldn't have any lens fogging issues. Though I'd still recommend using a filter to protect the lens from the fog juice.
The mirror is trickier- I agree with the dulling spray idea assuming the actor isn't wiping it away. If that's the case, shower steam may be the only option.
I didn't realize Spielberg was a DP.