(sorry I am no native speaker, and technical stuff is even more difficult to me to express...)
something, which came into my mind reading of "cleaning electronics":
Even if things may work great in the moment, they may become even worse
later (half a year or even longer).
Reason: The solvents may contain "addtional substances" which help for
the intended usage of that solvent but are bad for the current one.
Aceton: Highly aggresive solvent. Eats nearly everything called "plastic".
Good solvent for grease.
Nail polisher: Often this is Aceton mixed with oils, so that the nails do not
loose to much of it. After the Aceton evaporises, the oils remain. And they
do that everywhere...also in the calculator.
Any technical solvent, which is made for "coarse mechanics" should only be applied
to "coarse mechanics"...again the reason are "addtional substances".
To clean "delicate electronics" and "fine mechanics" I would prever pure substances
from the pharmacies. Propan-2-ol, 2-Propanol, Isopropanol, "Isopropylalkohol" (german word),
is great for removeing oily and greasy stuff. It cannot remove oxyds, though.
Even methylated spirit contains other substances than Methanol, which remain in the calculator like
tannin (it is added to the alcohol to denature the alcohol -- it is tasting very bitter...).
And tannin is a (weak) acid.