I was planning to give my bookport to a young lady who has just lost her site so that she could listen to the books I have on it but, unfortunately, I did not remove the batteries before putting it away. You guessed it. The batteries have leaked and I need to clean it up and getting working again. I have tried to clean it up but there is a residue of the battery liquid and I am looking for a chemical that is not abrasive and is light enough to remove the remainder of the muck. Any suggestions?