The outer back of the DMR has a number of white labels. On the left are button labels: Play, Delete, Protect, Info.
In about three years of DMR use I managed to obliterate most of these four labels. I suspect it is caused by oils (maybe acids?) or other secretions from the skin of my fingers (mainly, thumb).
Now that the entire back plate has been replaced by a new one, I want to avoid the trouble described above. I propose regular cleanings.
Please advise the acceptable fluid to use in cleaning.