Depending on how bad it is and if its already worn in the first place.
You may be able to remove it and use electronic parts cleaner on it but that may dry out some of the keys and change the color and feel.
If it was me Id be going for the OEM panel over the aftermarket keys that is a C&P from a Chinese Ebay listing. Yes Amazon will back it up but would it be worth the PITA of disassembly again. With the full panel you simply remove and replace the top and as Clint pointed out the hardest part are the ribbon cables. They are just tiny and the connectors are flimsy. Toast a connector on the MOBO and you have screwed the pooch! If you attempt the Chinese keyboard then you still have to disassemble the top and remove it then replace the keyboard section in the top so a lot more work.
By far the most difficult part is getting the top off in the first place. Once youve done it a time or two it becomes easy though. Lots of vids that show it. Just search your model and "disassembly". For the most part its just locating the screws from the bottom, popping off the center cover over the hinges in the rear then getting under one of the corners in the back with a thick plastic card. I use two magnetic hotel room keys (Had them from business trips, who doesnt end up with these!) and get them under the edge in the back and start sliding them to the front and around. When you get to one of the catches you will hear a slight pop as it lets go. (same putting it back together)
“Two things are infinite: the universe and human stupidity, I'm not sure about the former” ~ Albert Einstein