Or, you could wash as you currently do (personally, I don't feel my car is clean unless I spray it with at least, a hose, and hit it with a mitt & soap), and lay down a layer of sealant, or wax 1/4 of the car per wash.
I like sealant and waxes. I've come to think they protect better at bird poop etching than a thin spray wax, or thin spray sealant.
Once, it's sealed, or waxed. It should dry quicker.
If you do go the rinseless method, Optimum makes a spray sealant that also avts to dey the car quicker as you use it. For get what it's called though.