I use about 1/4 cup of dishwasher soap in a bucket of water as deck wash. I scrub with a push broom, then rinse really well. The deck comes out very clean without the cost of deck wash.
By Kathleen from Reno, NV
One of the most important steps to keeping a deck from rotting is to clean it with deck cleaner once a year. To save money on deck cleaner make your own. This page contains deck cleaner recipes.
Ammonia is good general purpose cleaning agent that can be used on many surfaces. This is a page about clean teak wood with ammonia.