I asked my bassteacher on some tips of what I could do to take care of my bass the next time I changed strings and he answered that I could use some steelwool and paraffinoil on the fretboard. (My greatest problem is that I don't know if "paraffin" is the correct word...) #1. I presume that i should us the steelwool between the fretwires. #2. Is paraffin oil a good fretboardoil?