LOL!
Dust is amazingly adaptive entity.
While I realize you are talking about keyboards, musical.....My computer keyboard has a unique ability to accumulate dust in record time it would seem. I have a Logitech G510 which has lighted keys. Since during the week, I usually don't get to my computer until after dinner, I have a tendency to simply operate by the light of the monitor and the keyboard having lit keys...Kind of like being in a movie theater. I do have an over head light in the room....But I hate, detest, overhead lights. When the weekend rolls around, it's astonishing how dirty the keyboard is, how much dust has accumulated between the keys.
I keep an air tank in the music/computer room just for that purpose.
Also, the last guitar I play stays out of the case, and there will be dust on the peghead. it drives me a bit bonkers. years ago, I ripped out the 1" filter racks and put in 2" racks so I can use thick air filters, but alas....The Dust Abides.
I wish I had simply pursued the instrument I always wanted to play. Drums. Throw a sheet over them and you're good.
My parents would not abide drums...A flat NO.