Cleaning rubberized / soft lid cover of G-series

Hi guys,
I have an veteran G53JW, and i know many newer G-Series notebooks have same or very similar rubberized material used on keyboard area and especially as lid cover coating.

During the last 5 years, i never ever took care of what material was used on that surface and didn't tried to learn how to clean. What i noticed, if i press and slide my hand, fingers over the rubbery surface, it begins to peel!

At first, i supposed that the peeling stuff would be massive smudge/dirt over the lid cover but i'm not sure.

I just want to clean this lid cover safely:

Currently, almost half of my G53's lid cover's rubbery/soft coating is peeled, in the beginng, i was supposing that the peeling material was just a smudge/dirt layer, but again, i'm not sure if it's peelable or just a bunch of dirt, dunno. After cleaning with micro-fiber cloth + cleaning liquid, i can see the colour difference which implies the peeling material was rubber coating, I tried cleaning with eye-glass cleaner liquid + soft cloth and wet towel, and all i get is black rubbery matterial and no fresh clean.

And interestingly, don't get me wrong, if i put a piece of "spit" over the lid cover, it's not dried and places a spit-mark over the surface which is also interesting.

Somewhere, i read it's recommended to use IPA (isopropyl alcohol) but i'm not sure whether it damages.

Is soft/rubberized finish faulty or very lousy?

Please help, thanks in advance!

 

I have a g751-jt and the whole thing is pretty much covered with that rubberized coating. The best way by far (after months of trial and error using cleaners and stuff) that i have found to safely clean mine and get all the dirt and oils out is a Magic Eraser and a good microfiber cloth. I use the blue micro-cloth's meant for detailing car interiors, it costs a couple bucks more but they don't leave lint plus they're a little thicker. No need for any chemicals, I just run the eraser under water and ring it out really really well...so well that it barely feels damp. Lightly wipe your laptop down in sections and use the microfiber cloth to buff the wet areas before they dry. You wont get streaks this way. Mine comes away looking brand new when I do this. The zipper on the case i use for my laptop had put a pretty good scuff mark on the top, it was there for a couple months before i tried this and that eraser took it right out.
If you clean your keyboard like this I would advise letting the eraser air out a bit then run it over your key board light enough that you don't press down the keys too hard (this way you don't accidentally squeeze water down in there) then go ahead and buff them with the cloth.
I don't know if this will help with your peeling problem, but i dont see it making it worse. At the very least your laptop will be clean without the risk of a solvent eating into your finish.
Anyways I hope this helps!
Red.