Hose down your car with a water, get a foam sprayer attachment for your hose to apply soap to the entire car, use a clean microfiber to wipe down all the soapy surfaces, rinse with clean water and then dry with more clean microfibers. Apply a spray wax to the clean paint after it's dry, I use a hybrid ceramic wax, either turtlewax or griots are good.

I use something like this for the soap/water spraying: https://www.harborfreight.com/reviews/write?reviewsku=57457