Wood or composite: does the method change?
Pressure-treated and natural wood
Wood holds moisture and grows mildew in this climate. It turns gray in strong sun, and the top layer dies off. A restorative cleaner brightens the wood, and the crew uses a fan tip and light passes. Soft woods need a lighter hand than hardwoods.
Composite and PVC decking
Composite does not rot, but mildew can still grow in the grooves and shaded spots, and food or grease can stain the surface. It is cleaned with a cleaner made for it and a gentle rinse. High pressure can damage the surface texture and may void a maker's warranty.
If you are not sure what your deck is made of, send a photo. That is enough for a first answer.

