Is your piano's finish gloss, or matte? That affects how you would care for it.
As a general rule, Cory's Piano Polish (and other products) is well thought-of. I buy mine from my piano tech when he is here, and it is also carried by
http://pianosupplies.com , PW's 'other half.'
I would also consult the store (if you bought yours through one) or the manufacturer for their instructions or recommendations on how to care for your finish.
Be very gingerly about how you use that oven mitt. House dust can be very abrasive, and you can put dust scratches on your piano while trying to be good to it. Personally, I do not use a cloth for dusting. A good-quality ostrich feather duster moves the dust off the lid very effectively, without sandpapering it.
The keys are likely to need actual cleaning more than the lid will need polishing. Kawai's instructions: very soft cotton cloth, very lightly damp, with a short spray of Windex, sprayed only on the cloth. The moisture film should never stand more than two seconds, if that, on the keytops, and never ever run down the sides of the keys. Ever.
Best practice is to wash the hands before playing, and never eat fried chicken while playing.
