Often Nissin will supply their pads as OEM with the calipers including all other hardware. What you use is personal preference.
If you don't want to use brake cleaner, a non greasy solvent that is fast drying is a good choice. Just be aware if using flammable solvents around hot parts.
I have wurth spray bottle filled with shellite. Works a treat for cleaning lots of parts. Not so harsh that it damages plastics, but easily shifts oil and evaporates quickly.
|