To keep the stains off your laptop screen in the first place, paper was suggested as a solution.
I do prefer kitchen towels, as they provide some additional features:
- they are dust-absorbing
- provide protection against pressure/shocks from outside because of their softness
- long and soft fibres agains ripping and scratching (in contrast to reaular or toilet paper)
In my case, I just folded them, so that I got 3 layers in total and it works perfectly for a 17" Laptop with a sensible (4k, nonglare) screen. YMMV, depending on your model, you might need more or less layers. Cut and fold according to your needed size.