@2112oracle , Mix 1 part 99% Isopropyl alcohol with one part distilled water and pour it into a spray bottle. Spray the dust cover and wipe off with a clean microfiber cloth. NEVER use fabric softener when washing and drying your microfiber cloths or you will create one big smudge. This mixture is also the best glass cleaner you can buy and dirt cheap.
If you develop swirl marks over time you can take them out by buffing with any fine automotive compound. I use Menzerna's 3500. If there is a scratch but you can not feel it with a finger nail use 2500 followed by 3500. If there is a scratch that you can feel with a fingernail you can take it out (if the plastic is thick enough) by wet sanding 600 grit to 1200 grit to 2000 grit then 2500 followed by 3500. You have to do this all by hand. A rotary polisher will melt the plastic if you are not trained to use it. It is safer to do by hand using clean microfiber cloth. You never go at it with a contaminated microfiber cloth. If you drop it it goes right back in the wash and you get another one.
