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Couldn't find a previous reference to this subject so advice please.

The keys on my new CA71 Kawai have an unpleasant "silicone" feel which seems to be a residue from the mould release or polishing process. Is there a preferred cleaner which would remove this stuff without damaging the key lever surface?

Thanks.

That's just me but ...
I remove the finger prints and oil with a wet piece of cloth that I damp in warm water in which I added a little bit of vinegar.
It works for my digital plastic keys, for the 31 years old ivorite and ebony keys of my Yamaha grand.
I work with the wet cloth on 10 to 12 keys, then dry them up immediately with a soft dry cotton cloth. And then again for the next 10 to 12 keys ...

old t-shirt, only partly wet will do it

Thank you both for the responses. This stuff is stubborn but vinegar seems to be working.