Keyboards can be cleaned out by wiping them, spraying them out with compressed air, or if they are really filthy, pulling off all the keycaps and soaking them i

Keyboards can be cleaned out by wiping them, spraying them out with compressed air, or if they are really filthy, pulling off all the keycaps and soaking them in soapy water (some people put their keycaps through a dishwasher; the obsessive use an ultrasonic cleaner), and thoroughly wiping the space underneath. In extreme cases the case can be opened up and the plastic parts can be washed separately. If a keyboard sits on a very dusty garage shelf for 20 years with no cover, sometimes dust works its way inside the switches; cleaning that out is a lot more complicated, requiring desoldering and disassembling all of the switches. Don’t do this to your keyboard, and watch out for the condition of decades-old used keyboards. * * * Personally I like very loud clicky keyboards, like the IBM model F or anything with clicky Alps SKCM or SKCP switches (from the 1980s–early 90s). If you can find one in good condition and don’t mind an adapter, I quite like the Apple Extended Keyboard II from ~1990 which is reasonably quiet (likely louder than the Amazon board; if you want to further reduce the sound you could open up the case and fill the empty spaces inside with some kind of padding – I know people who have successfully damped sound with sheets of drawer liner or felt). Tactile Cherry MX switches (or any of the many MX clones) with added o-rings or other padding are reasonably quiet. I’m not really the person to ask though. Again, filling empty spaces inside the case can do a lot to damp the sound.