I also using ONR (Optimum no-rinse) to clean my Ceramic coated Model 3.
Depending on how dirty the car is, I usually wash it weekly so not a lot of dirt can accumulate.
• If it's dirty, I give it a pre-soak to loosen the dirt
• Use ONR mixture in spray bottle, spray panel area and wipe each panel with microfiber towels (Flip towels for next panel) Typically use 2-3 towels.
• Use edgeless drying towel to dry panel.
• For windows, I use lint free towel.
Takes about 30-45 minutes including cleaning wheels and light interior cleaning (without vacuuming)