I would recommend regular playing to keep the "innards " nice and fresh.
The soft cloth is of course the best. It's amszing how much dirt etc comes off us as we play.
A dust cloth to cover it if you leave it out.
I've heard some use one of those hand held vacuum cleaners one in a while softly between keys and grill but I'm not sure its' that useful.
The accordion I play most is always left out because it is played every day, but covered with a soft cloth when not in use. I have never yet cleaned an accordion but I would think a moist cloth should be sufficient unless its pretty bad in which case the experts would be able to advise. Some time ago I bought a little kit containing two little bottles, a cloth and instructions on eBay for whitening the keys that yellow with age, though I have never used it. I dont know the name of it but its got a label underneath in German that says Vorratsbox flach m. CV. Alfa GmbH Werner-Von Iemens-Str 5 65582 Diez. Whatever that means.
I recommend looking between the bellows folds occasionally, especially the top side, and cleaning out any dust or fluff with a soft dry brush. As a repairer I'm constantly amazed and sometimes revolted by the junk I find in there. :shock:
I always wondered why there`s almost always tons of fluff in the top side of the bellows of old accordions (Melodeons too) - almost as if it used to be the "correct thing" years ago to leave accordions on their side with the straps undone for months on end ? .
ive done that - nervous at times of developing hand tremble and causing damage tho
i also wondered about using air pressure spray (the kind you get in an aerosol to clean pc keyboards etc) and tried it but the worry is it creates moisture
(incidentally this was banned from being in used in a bank i worked at once as a lady was cleaning some electronic uquip. when it exploded out at her causing some harm - prior to that it was used not sparingly by some to keep machinery clean etc)
An 'air duster'. Yes I've used them on my PC and other projects - good idea to switch them off first...and leave them off for any droplets to evaporate. I prefer to vac (with a good filter) rather than blow dust out of accordions if possible, after removing reeds, rather than breath in 50 year old dust blown into the air. I'd use em for places the vac isn't geting to tho' that wouldn't be harmed.
Good job Jarvo isn't around or I'm sure he'd be making some comment about the 'other crevices'.