For me - isopropyl alcohol always has worked well for me - I have not used mineral spirits even though there are "some" that say you can - and I wwould NEVER use brake cleaner. You lightly sand pads to remove contamination - and replace when necessary
I just wipe mine down with isopropyl alcohol as needed, and at least every couple weeks when I do my routine maintenance (general wipe down, tighten bolts, lube chain, pump air, etc).