When my tuner takes off the casework to tune my piano I notice how dirty and dusty it is inside. Is there anything I can do to keep the piano clean myself?
Treat your piano like a valuable piece of furniture: keep it clean and avoid standing drinks, vases of flowers, or potted plants on it. Spilled liquids can cause serious damage, the repair of which may amount to a serious overhaul. New pianos are generally finished in polyester which requires only to be wiped over with an anti-static cloth or special cleaning preparation, definitely no wax polish! Unless you are very confident in what you are attempting, it is probably best to leave the inside of the instrument to the care of your tuner. Even removing the top door, fall, and bottom door can prove problematic as can replacing them properly. The dust and debris you can see when the tuner is working on your piano is best left where it is, not causing any problems. Dust tends to settle inside where it does no harm and moving it around could change that delicate balance; it takes only a small bit of grit to jam two keys together. That said, if your piano is really dirty, ask the tuner to clean it for you. At least if he knocks the delicate action out of kilter, he will be able to put it right again.