Put shower caps over the mirrors, then wash them separately>>>
 

just Kidding.....blow out the mirrors with your air compressor after you finish washing!

After I dry I put Zaino from mirror to bottom of door so i don't get water spots
 

this is the only way I can keep it from streaking down the door. I'll let it sit over night and wipe in the AM.

I go around with a roll of paper towels and a jewelers flat tip scredriver>>
 

and use the paper towels to soak up every last bit of water from window seals, bumper cracks, lights, plates, etc.... Some I slide in and let sit... I fold one up and slide between the mirror glass and housing.... and fold them up and slide them along the bumper and the hatch...

sometimes I use the screwdriver to slightly lift the weatherstriping around the quarter windows and stick a paper towel in there too

works wonders! I never have spots anymore

now if I could just do something about condensation collecting on the car overnight :(

Ditto, about the compressor that is....