What shitty keyboard cover? I've never heard of a keyboard cover with a laptop (and haven't seen a desktop keyboard cover since about 1995).
Anyway, search for "ultra thin mouse pad" on Amazon. The largest ones are 0.5-1mm thick. Measure 11"x11". They have a tacky back. Cut it to fit.
Well that might just be my solution
Also, a good mouse means you don't need a mouse pad. I have mice that work everywhere, and a couple that don't like certain surfaces.
Though I still like using these pads - they make for a nice, consistent surface, and I like the texture, it makes the mouse glide nicely.
Keyboards covers are usually too thin to be a decent mousepad. Id look for a mousepad that fits into your current bag so probably something the size of the laptop itself
I'm assuming that OP is referring to the white (sometimes foam, sometimes shitty microfiber) packing material that is placed between the keyboard and screen for shipping. Since most mice are optical based the tracking surface doesn't really matter unless you are someone who needs extreme precision so this "keyboard cover" would probably be fine.
It's not even about performance it's about the thin mousepads never wanting to stay put and folding over on the front edge.
Why bother with a mousepad at all? All it really serves as is an exclusion zone for energy drinks and dirty dishes.
I've used the 0.5/1mm plastic mouse pads for years (I have a couple that are 10 years old now), they don't slip because the back is a tacky surface, and the front is a textured surface.
Will take a look at it
I'm using this one since 9 years in several 14 inch devices and it it serves me very well. Unfortunately you can't buy that specific brand in amazon anymore. Bummer. https://www.amazon.de/gp/aw/d/B0057UWXF8?psc=1&ref=ppx_pop_mob_b_asin_title
Yap would be something like this
Sounds like a terrible idea - mouse pads get dirty, on both sides, and you'll be transferring that dirt to the screen.
There's really no safe way to clean a laptop screen - they generally have anti-reflective coatings which will be worn down when you clean them, and it won't wear evenly it will be worse where you've cleaned off a particularly bad smudge. I try to be as careful as I can but still all my old laptop screens are pretty bad by the time I upgrade and I feel like your proposed idea would make that even worse.
What you can buy is a laptop bag/sleeve that doubles as a mouse pad. Some of them can also lift the screen up high for better ergonomics - though then you'd also need a portable keyboard as you definitely don't want that up high if you're worried about ergonomics (I recommend the Nuphy Air if you're interested in a good portable keyboard).
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