Yup. Sounds crazy right? If you poke around for posts about clouding, you'll inevitably find posts about the rub out method.
If you try it with the set on you can tell pretty easily how hard to press because you'll see psychedelic swirls where you're pressing. Otoh that really freaks some people out because it sort of looks like you must be breaking something!
Fwiw on my old Vizio it was astonishing what kind of physical pressure I could put on the screen in this way without doing any damage. It had horrible clouding in two spots at first. One all but went away after rubbing, the other was still a little visible during very dark content.
My Samsungs were better ootb but I did rub a little on my 75" which seemed to help.
The assembly tolerances of these sets are incredibly tight thanks to the industry fetish with thinness. The assumption is that cloudiness is caused by unevenness between different layers of the sandwich. So, rubbing gently theoretically forces the layers closer, from which they then spring back into (hopefully) better spaced alignment.
All this said, I'm neither an engineer nor a guarantor of this method's safety! So, try at your own risk, ymmv, etc etc etc. THAT said, and as I mentioned earlier, I'd recommend you do some searches and see what other people say about it. It may help alleviate concerns.