I use a plastic drink bottle full of distilled water with a very small hole in the cap, along with a small bucket full of soapy water (the type they sell in auto stores, safe for waxed surfaces). Aim it at the part you want to wash, squeeze a bit out of the bottle to wet the car, then have at it with a soft sponge, rinse the soap off with the soda bottle "sprayer", too.
The driveway to my house is inclined....I start with the car aimed up the incline and do the area behind the cockpit first, then turn the car around and do the area ahead of the cockpit. Last to get done are the dash and the doors....never get a drop of water in my interior.
Most often a 1-litre bottle of distilled water is adequate....for both the pre-wash wetting and the rinsing. No spots, but then with a decent coat of wax the water always beads off and runs off "downhill" where I wash the car, that's why I turn it around halfway through.
I do use a California duster between washes to get off the loose dust and debris...and glass cleaner on the windshield.
Cheers!
Dugly
