There is no other alternative than hot water and detergent to clean asphalt, concrete, vinyl siding, decking… the list goes on and on.
Pressure washing is very effective, but it does come with some considerations. You have to know what pressure to use, how far away from the target you need to be, etc. That’s why it is wise to hire a professional to take those concerns off your hands and allow you to enjoy you free time doing something you love. Leave it to the professionals to keep your biggest investment in long lasting condition.