Dell Latitude touch screen problem

I ordered an Dell Latitude E7450 touch screen laptop from Dell Refurbished in 2019. It looked beautiful and like new when it arrived. However, after sitting on table and use for a few times (since I used desktop and company's laptop) in a couple months, a few liquid marks started to show out on the top left and right sides of screen. I contacted Dell and they sent me a replacement screen. Since I connected the laptop to an external big monitor, I didn't replaced the screen after I received it. Now the screen becomes really bad (see the picture). I take out the new screen that Dell sent to me (still in original box) and want to replace it, but I find Dell send me a wrong screen, a generic LCD screen instead of a touch screen, so I cannot change it. Is there anyway that the  touch screen can be fixed without spending big money? Thanks!

Dell Latitude E7450 Touch