Well I don't know what to say to this statement, that rubbing alcohol causes problems as the last writer just wrote.
The guy I contacted orginally about getting help with fixing my keyboard, had worked in a shop that almost exclusively worked on Fatar keyboards, and especially in Kurzweils.
It was he that sent me a photo and instructions on how to use the rubbing alcohol once I got the keyboard disassembled.
Lastly, I was curious as to the ingredients in Isopropyl alcohol and it does not have any oils in it. I read through several definitions on the web, and Wikipedia does not differ from any of the other sites. Here is what is says about the uses of Isopropyl alcohol:
USES:
Isopropyl alcohol is readily available. Like acetone, it dissolves a wide range of nonpolar compounds. It is also relatively non-toxic and evaporates quickly. Thus it is used widely as a solvent and as a cleaning fluid, especially for dissolving lipophilic contaminants such as oil. Examples include cleaning electronic devices such as contact pins (like those on ROM cartridges), magnetic tape and disk heads, .... including removing sticky glues.... etc.
But I'm not an expert. Two technicians of keyboards gave differing answers to the trade. I don't know.