He only reads the titles of threads and replies based on the first thing that pops into his head. He ignores the contents of the post. Best to put him on ignore.

Normally I clean the pistons with a dry paper towel. On a few occasions I will spray a little bit of WD-40 onto the paper towel (far away from the bike) and then do the same thing, mainly to remove residue that accumulates and causes the piston to stick or retract slowly.

The only thing I have cleaned pads with is sandpaper.

The only thing I have cleaned rotors with is isopropanol.