DI water is the secret sauce for speed. Use it for rinsing after your wash, and you're good (depending on the PPM you end up at). Ceramic coating help a lot too.
My "fast wash" technique is foam.cannom, contact wash using the foam wither either a long brush for my big stuff, or a mitt for my smaller cars. Then rinse with DI water, and blast the air off with the electric leaf blower, don't have to go for perfect here, just blow as much off the horizontal surfaces as you can without worrying too much. The harder part is getting all the soap out honestly.
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