My 2 yrs old granddaughter sprayed freeze on my tv screen, now has dark grey spots on it. What to do.

Sounds like panel fault. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

Hi Brandon,
I am afraid that the dark spot in the screen is not repairable. Manage as long as you can or go for a new tv.

It's a bad pixel spot. I have a TV that has a dark spot.
Nothing you can do about it.

In most of the case, the problem is a defective display LCD panel, this problem in some terminology is called PIXEL RETAINING, it means the pixels are locked up, there is no good permanent solutions for it, you have to change the LCD panel.

could be pressure damage from objects at it, hard to say, usually the glass would have spider cracks around each presure spots, but LCD is soft so the pressure damage explains what happened.
If the spots are near the bottom the liquid may have crept upward from the edge , try a hair dryer on a spot and see if it changes indicating liquid is still in there.

I’m happy to help further over the phone at https://www.6ya.com/expert/eric_ab7c09ec01841771

If they used it as taget practice, then the dark semicircles at the bottom of screen is most likely a crack in the screen, the screen would need to be replaced. not worth the fix. the only other time i see circles on the screen is if the screen has failed

dark spot could be a faulty led. if you put a program on that is in white screen you should see all the leds light up the screen. dark spot will be were the led is not working. if on white screen and they all lite up but still dark around the area, it could be the lcd screen. and could be dying pixels. and try this video https://youtu.be/wlA2rcrAOCs

Try reinstalling the gpu driver. If the problem still persists, the screen may be going out.

if you set is over 4 yrs old the tube is at fault,you may try to adjust the screen settings.

Replace the CCD base assumbly